The Vanguard Collection
+ The Winter Offensive Collection
StatTrak™
Classified → Covert
About the craftCraft 1743128 · ways to build: 5StatTrak™ craft. Inputs and outcome are StatTrak: a normal item won't do here, and the outcome sells at the StatTrak price, not at the price of its normal counterpart.The Steam fee is included. You can sell the outcome a week after crafting.
Average profitAverage profitPer craft, Steam fee included: the average over all outcomes with their chances minus the investment.+56.05$
Invest InvestBy the cheapest listings of the right wear, float not counted. The real purchase — after «Check floats on Steam».304.90$
Average return Average returnAfter the Steam fee, averaged over outcomes with their chances.360.95$
ROI ROIProfit divided by the investment.+18.4%
Chance of profit Chance of profitThe share of outcomes (by their chances) that pay back the input.45%
If buying now (with float)
invest at least 772.42$
· profit at most −411.47$
(at most -53.3%) · chance of profit at most 0%
An estimate from the market at the time of the measurement: cheap lots with the needed float may have been bought out or relisted — this is a check, not a forecast. “Check floats on Steam” shows the real price now.
!
The float limit is tighter than the markup table — less than 30% of the wear window fits. The purchase will cost at least the shown number of times more; how much more — no data, so the investment is “at least” and the profit is “at most”.
StatTrak™ SCAR-20 | Cardiac (Battle-Scarred) × 112% of the wear window fitsat least ×2.1612.39 → 26.77 $
StatTrak™ P250 | Mehndi (Battle-Scarred) × 112% of the wear window fitsat least ×2.1627.78 → 60.02 $
StatTrak™ P250 | Mehndi (Field-Tested) × 812% of the wear window fitsat least ×2.59264.72 → 685.64 $
Markup — analysis table from lot books 25–26.09.2026: how many times the N cheapest lots with the needed float cost more than the cheapest lot of the wear; it depends on what share of the wear window fits and on the number of pieces.
profit on prices without salesIf these items are never sold, the profit is at least −299 $Which itemsIf these items are never sold, the profit is at least −299 $: StatTrak™ M4A4 | Asiimov (Field-Tested), StatTrak™ Sawed-Off | The Kraken (Minimal Wear), StatTrak™ AK-47 | Wasteland Rebel (Field-Tested)
Craft variants
Craft variants
The same main collection (or the second one) with another partner — a different collection for balance. Numbers come from the same recount as the list. A variant at a loss is shown only if the loss is no more than 15% of the investment, the most expensive outcome brings at least three investments after the fee, and its price is confirmed by sales.
marketplace pricesells slowly55% of probability — outcomes selling fewer than 21 times a week (3 a day): at the lowest price they won't be bought right away.rare inputsThe rarest input sells 0 times a day: slow to buy up, the price will move while you buy.
продажа ненадёжнаmarketplace pricePrice from CSFloat / Market.CSGO listings: at least 3 listings, checked against the second marketplace or the neighbouring wear. It sells there, and the money is real.sells slowly55% of probability — outcomes selling fewer than 21 times a week (3 a day): at the lowest price they won't be bought right away.float out of reachThere are enough lots, but the needed float can't be reached with them: the craft can't be put together with the promised wears right now.rare inputsThe rarest input sells 0 times a day: slow to buy up, the price will move while you buy.
продажа ненадёжнаmarketplace pricePrice from CSFloat / Market.CSGO listings: at least 3 listings, checked against the second marketplace or the neighbouring wear. It sells there, and the money is real.sells slowly50% of probability — outcomes selling fewer than 21 times a week (3 a day): at the lowest price they won't be bought right away.rare inputsThe rarest input sells 0 times a day: slow to buy up, the price will move while you buy.
marketplace pricesells slowly55% of probability — outcomes selling fewer than 21 times a week (3 a day): at the lowest price they won't be bought right away.rare inputsThe rarest input sells 0 times a day: slow to buy up, the price will move while you buy.
marketplace pricesells slowly55% of probability — outcomes selling fewer than 21 times a week (3 a day): at the lowest price they won't be bought right away.rare inputsThe rarest input sells 0 times a day: slow to buy up, the price will move while you buy.
How to build
Ways to build
5 ways: the best first, then the most accessible. A tab makes the way current — the tiles and outcomes are recalculated for it.
!
12% of lots fit≈ enough for 0contracts · hard (by listings)
Price understated: only 12% of lots fit, and a rare float costs more than a regular one. The database has the item's average price, without float — the real purchase will cost more.
×1
StatTrak™ SCAR-20 | Cardiac
Battle-Scarred
buy0.4500–0.5134
(13% of this wear's listings)
12.39 $
at 12.39
SteamBuyLis-SkinsCSFloatMarket.CSGOPurchase detailsexact upper edge 0.513422f′ (normalized) 0.513422wear 0.4500–1.0000on the market 13 · good ≈ 1
on the market with this float, usually ~2,
new per day — can't tell yet, cheapest usually 14.01 $ · little data: 0.0 d.
Lis-Skins: suitable 4 of 26 · from 10.54 $ (float 0.4642) · craft not before 15.10 · data 07.10 02:08 MSK
×1
StatTrak™ P250 | Mehndi
Battle-Scarred
buy0.4500–0.5134
(0% of this wear's listings)
27.78 $
at 27.78
SteamBuyLis-SkinsCSFloatMarket.CSGOPurchase detailsexact upper edge 0.513422f′ (normalized) 0.513422wear 0.4500–1.0000on the market 11 · good ≈ 0
on the market with this float, usually ~0,
new ~0.0 per day
Lis-Skins: suitable 1 of 4 · from 29.05 $ (float 0.5020) · craft not before 15.10 · data 07.10 02:08 MSK
×8
StatTrak™ P250 | Mehndi
Field-Tested
buy0.1500–0.1765
(0% of this wear's listings)
264.72 $
at 33.09
SteamBuyLis-SkinsCSFloatMarket.CSGOPurchase detailsexact upper edge 0.176522f′ (normalized) 0.176522wear 0.1500–0.3800on the market 14 · good ≈ 0
on the market with this float, usually ~0,
new ~0.0 per day
Lis-Skins: no listings with this float (total 26) · data 07.10 02:08 MSK
Set · 10 pcs304.90 $
+56.05
(+18.4%)
Average float of the setaverage normalized 0.243902339result 0.380000, 0.097561, 0.208537, 0.146341«No higher than» is a guarantee: take every position at the upper limit — you get exactly what is shown.
!
profit on prices without salesat least −232 $
!
10% of lots fit≈ enough for 0contracts · hard (estimate)
Price understated: only 10% of lots fit, and a rare float costs more than a regular one. The database has the item's average price, without float — the real purchase will cost more.
×3
StatTrak™ SCAR-20 | Cardiac
Well-Worn
buy0.3800–0.3873
(0% of this wear's listings)
38.52 $
at 12.84
SteamBuyLis-SkinsCSFloatMarket.CSGOPurchase detailsexact upper edge 0.387345f′ (normalized) 0.387345wear 0.3800–0.4500on the market 18 · good ≈ 0
on the market with this float, usually ~0,
new per day — can't tell yet · little data: 0.0 d.
Lis-Skins: no listings with this float (total 30) · data 07.10 02:08 MSK
×1
StatTrak™ P250 | Cartel
Field-Tested
buy0.1500–0.1741
(under 1% of this wear's listings)
18.68 $
at 18.68
SteamBuyLis-SkinsCSFloatMarket.CSGOPurchase detailsexact upper edge 0.174134f′ (normalized) 0.232179wear 0.1500–0.3800on the market 27 · good ≈ 0
Market history: no data yet
Lis-Skins: suitable 3 of 85 · from 22.67 $ (float 0.1617) · craft not before 15.10 · data 07.10 02:08 MSK
×6
StatTrak™ P250 | Mehndi
Field-Tested
buy0.1500–0.1741
(0% of this wear's listings)
198.54 $
at 33.09
SteamBuyLis-SkinsCSFloatMarket.CSGOPurchase detailsexact upper edge 0.174134f′ (normalized) 0.174134wear 0.1500–0.3800on the market 14 · good ≈ 0
on the market with this float, usually ~0,
new ~0.0 per day
Lis-Skins: no listings with this float (total 26) · data 07.10 02:08 MSK
Set · 10 pcs255.74 $
+25.76
(+10.1%)
Average float of the setaverage normalized 0.243902339result 0.380000, 0.097561, 0.208537, 0.146341«No higher than» is a guarantee: take every position at the upper limit — you get exactly what is shown.
!
profit on prices without salesat least −273 $
!
8% of lots fit≈ enough for 0contracts · hard (by listings)
Price understated: only 8% of lots fit, and a rare float costs more than a regular one. The database has the item's average price, without float — the real purchase will cost more.
×2
StatTrak™ SCAR-20 | Cardiac
Well-Worn
buy0.3800–0.3854
(0% of this wear's listings)
25.68 $
at 12.84
SteamBuyLis-SkinsCSFloatMarket.CSGOPurchase detailsexact upper edge 0.385448f′ (normalized) 0.385448wear 0.3800–0.4500on the market 18 · good ≈ 0
on the market with this float, usually ~0,
new per day — can't tell yet · little data: 0.0 d.
Lis-Skins: no listings with this float (total 30) · data 07.10 02:08 MSK
×1
StatTrak™ P250 | Mehndi
Battle-Scarred
buy0.4500–0.4928
(0% of this wear's listings)
27.78 $
at 27.78
SteamBuyLis-SkinsCSFloatMarket.CSGOPurchase detailsexact upper edge 0.492809f′ (normalized) 0.492809wear 0.4500–1.0000on the market 11 · good ≈ 0
on the market with this float, usually ~0,
new ~0.0 per day
Lis-Skins: no listings with this float (total 4) · data 07.10 02:08 MSK
×7
StatTrak™ P250 | Mehndi
Field-Tested
buy0.1500–0.1679
(0% of this wear's listings)
231.63 $
at 33.09
SteamBuyLis-SkinsCSFloatMarket.CSGOPurchase detailsexact upper edge 0.167902f′ (normalized) 0.167902wear 0.1500–0.3800on the market 14 · good ≈ 0
on the market with this float, usually ~0,
new ~0.0 per day
Lis-Skins: no listings with this float (total 26) · data 07.10 02:08 MSK
Set · 10 pcs285.10 $
+49.37
(+17.3%)
Average float of the setaverage normalized 0.243902339result 0.380000, 0.097561, 0.208537, 0.146341«No higher than» is a guarantee: take every position at the upper limit — you get exactly what is shown.
!
profit on prices without salesat least −252 $
!
8% of lots fit≈ enough for 0contracts · hard (by listings)
Price understated: only 8% of lots fit, and a rare float costs more than a regular one. The database has the item's average price, without float — the real purchase will cost more.
×1
StatTrak™ SCAR-20 | Cardiac
Battle-Scarred
buy0.4500–0.4928
(6% of this wear's listings)
12.39 $
at 12.39
SteamBuyLis-SkinsCSFloatMarket.CSGOPurchase detailsexact upper edge 0.492809f′ (normalized) 0.492809wear 0.4500–1.0000on the market 13 · good ≈ 0
on the market with this float, usually ~1,
new per day — can't tell yet, cheapest usually 14.95 $ · little data: 0.0 d.
Lis-Skins: suitable 3 of 26 · from 10.54 $ (float 0.4642) · craft not before 15.10 · data 07.10 02:08 MSK
×2
StatTrak™ SCAR-20 | Cardiac
Well-Worn
buy0.3800–0.3854
(0% of this wear's listings)
25.68 $
at 12.84
SteamBuyLis-SkinsCSFloatMarket.CSGOPurchase detailsexact upper edge 0.385448f′ (normalized) 0.385448wear 0.3800–0.4500on the market 18 · good ≈ 0
on the market with this float, usually ~0,
new per day — can't tell yet · little data: 0.0 d.
Lis-Skins: no listings with this float (total 30) · data 07.10 02:08 MSK
×7
StatTrak™ P250 | Mehndi
Field-Tested
buy0.1500–0.1679
(0% of this wear's listings)
231.63 $
at 33.09
SteamBuyLis-SkinsCSFloatMarket.CSGOPurchase detailsexact upper edge 0.167902f′ (normalized) 0.167902wear 0.1500–0.3800on the market 14 · good ≈ 0
on the market with this float, usually ~0,
new ~0.0 per day
Lis-Skins: no listings with this float (total 26) · data 07.10 02:08 MSK
Set · 10 pcs269.71 $
+38.28
(+14.2%)
Average float of the setaverage normalized 0.243902339result 0.380000, 0.097561, 0.208537, 0.146341«No higher than» is a guarantee: take every position at the upper limit — you get exactly what is shown.
!
profit on prices without salesat least −211 $
!
8% of lots fit≈ enough for 0contracts · hard (estimate)
Price understated: only 8% of lots fit, and a rare float costs more than a regular one. The database has the item's average price, without float — the real purchase will cost more.
×3
StatTrak™ SCAR-20 | Cardiac
Well-Worn
buy0.3800–0.3852
(0% of this wear's listings)
38.52 $
at 12.84
SteamBuyLis-SkinsCSFloatMarket.CSGOPurchase detailsexact upper edge 0.385286f′ (normalized) 0.385286wear 0.3800–0.4500on the market 18 · good ≈ 0
on the market with this float, usually ~0,
new per day — can't tell yet · little data: 0.0 d.
Lis-Skins: no listings with this float (total 30) · data 07.10 02:08 MSK
×2
StatTrak™ P250 | Cartel
Field-Tested
buy0.1500–0.1673
(under 1% of this wear's listings)
37.36 $
at 18.68
SteamBuyLis-SkinsCSFloatMarket.CSGOPurchase detailsexact upper edge 0.167369f′ (normalized) 0.223159wear 0.1500–0.3800on the market 27 · good ≈ 0
Market history: no data yet
Lis-Skins: suitable 1 of 85 · from 22.67 $ (float 0.1617) · craft not before 15.10 · data 07.10 02:08 MSK
×5
StatTrak™ P250 | Mehndi
Field-Tested
buy0.1500–0.1673
(0% of this wear's listings)
165.45 $
at 33.09
SteamBuyLis-SkinsCSFloatMarket.CSGOPurchase detailsexact upper edge 0.167369f′ (normalized) 0.167369wear 0.1500–0.3800on the market 14 · good ≈ 0
on the market with this float, usually ~0,
new ~0.0 per day
Lis-Skins: no listings with this float (total 26) · data 07.10 02:08 MSK
Set · 10 pcs241.33 $
+13.69
(+5.7%)
Average float of the setaverage normalized 0.243902339result 0.208537, 0.146341, 0.380000, 0.097561«No higher than» is a guarantee: take every position at the upper limit — you get exactly what is shown.
sell now to a buy order: 568.53 $
(you get 494.38)) · buy orders: 780
sell on Market.CSGO: 459.65 $ to your card
cheapest lot 504.01 · lots 11
on CSFloat: from 477.74 $listings: 38
on CS.Money: ~ 536.13 $
on Lis-Skins: from 483.90 $listings: 55
at a loss
worst
StatTrak™ Sawed-Off | The Kraken
Minimal Wear
126.05 $45.00%
price without deals
SteamStatTrak™ Sawed-Off | The Kraken (Minimal Wear)net 109.61you get 0.097561The Winter Offensive Collection
by lot · 0 sales per day
sell now to a buy order: 72.70 $
(you get 63.21)) · buy orders: 300
sell on Market.CSGO: 88.84 $ to your card
cheapest lot 97.42 · lots 3
on CSFloat: from 81.00 $listings: 6
on CS.Money: ~ 77.33 $
on Lis-Skins: from 76.17 $listings: 13
at a loss
StatTrak™ AK-47 | Wasteland Rebel
Field-Tested
144.01 $5.00%
price without deals
SteamStatTrak™ AK-47 | Wasteland Rebel (Field-Tested)net 125.23you get 0.208537
by lot · 0 sales per day
sell now to a buy order: 129.11 $
(you get 112.27)) · buy orders: 496
sell on Market.CSGO: 111.18 $ to your card
cheapest lot 121.91 · lots 22
on CSFloat: from 104.87 $listings: 49
on CS.Money: ~ 107.88 $
on Lis-Skins: from 105.49 $listings: 82
at a loss
StatTrak™ P2000 | Fire Elemental
Minimal Wear
138.00 $5.00%
SteamStatTrak™ P2000 | Fire Elemental (Minimal Wear)net 120.00you get 0.146341sells 2 a weeksell now to a buy order: 128.41 $
(you get 111.66)) · buy orders: 160
sell on Market.CSGO: 95.68 $ to your card
cheapest lot 104.91 · lots 12
on CSFloat: from 85.49 $listings: 19
on CS.Money: ~ 97.65 $
on Lis-Skins: from 96.35 $listings: 27
More
In a week, when the outcome can be sold
from outcome price history
In a bad week+24.46 $a worse week happens one time in ten
In a typical week+46.76 $historical median
If you repeat
10 000 simulations over the outcome odds
I already have items
enter their float — I'll pick what to buy
Items of this craft's collections of the right rarity fit: The Vanguard Collection and The Winter Offensive Collection — and of the mixed-in collection: enter its items with float, your own or ones you want to buy. Its share in the set is its share in the chances. Your items are counted at market price in the full profit — you could sell them; separately shown is how much money you need to buy the rest now.
Third collection
add one more to the craft's pair — it may pay more
All splits of inputs across three collections are tried — 1/1/8, 5/3/2 and the rest — and all outcome wears; the best set is shown for each collection. “Find the best” first quickly scores all collections and then calculates the five most promising exactly.
Similar
14 crafts almost like this one
The same set with a different wear of cheap outcomes — profit and investment differ by less than 0.5%; or the same nine items with a different tenth — profit differs by no more than 10%, investment by 20%; or the same main half, whose outcomes make the profit, with a different filler — profit lower by no more than a quarter, investment cheaper by no more than a quarter.
Craft 1740249
· The Prisma Collection + The Winter Offensive Collection · profit 58.45$
· invest 300.72$
profit on prices without salesat least −294 $float out of reachrare inputs
StatTrak™ XM1014 | Incinegator (Field-Tested) instead of StatTrak™ SCAR-20 | Cardiac (Battle-Scarred); StatTrak™ P250 | Mehndi (Battle-Scarred): float at most 0.489762 instead of 0.513422; StatTrak™ P250 | Mehndi (Field-Tested): float at most 0.166628 instead of 0.176522
Craft 1741587
· The Revolver Case Collection + The Winter Offensive Collection · profit 58.33$
· invest 303.63$
profit on prices without salesat least −304 $rare inputspricier variants exist
StatTrak™ G3SG1 | The Executioner (Field-Tested) instead of StatTrak™ SCAR-20 | Cardiac (Battle-Scarred); StatTrak™ P250 | Mehndi (Battle-Scarred): float at most 0.492743 instead of 0.513422; StatTrak™ P250 | Mehndi (Field-Tested): float at most 0.167874 instead of 0.176522
Craft 1733094
· The Genesis Collection + The Winter Offensive Collection · profit 56.78$
· invest 301.85$
profit on prices without salesat least −297 $rare inputs
Craft 1730886
· The Gallery Collection + The Winter Offensive Collection · profit 56.63$
· invest 303.60$
profit on prices without salesat least −296 $rare inputs
StatTrak™ P250 | Epicenter (Field-Tested) instead of StatTrak™ SCAR-20 | Cardiac (Battle-Scarred); StatTrak™ P250 | Mehndi (Battle-Scarred): float at most 0.494348 instead of 0.513422; StatTrak™ P250 | Mehndi (Field-Tested): float at most 0.168545 instead of 0.176522
Craft 1733692
· The Glove Collection + The Winter Offensive Collection · profit 56.35$
· invest 304.52$
profit on prices without salesat least −292 $rare inputs
StatTrak™ Sawed-Off | Wasteland Princess (Field-Tested) instead of StatTrak™ SCAR-20 | Cardiac (Battle-Scarred); StatTrak™ P250 | Mehndi (Battle-Scarred): float at most 0.506358 instead of 0.513422; StatTrak™ P250 | Mehndi (Field-Tested): float at most 0.173567 instead of 0.176522
Craft 1742819
· The Spectrum Collection + The Winter Offensive Collection · profit 56.33$
· invest 317.42$
profit on prices without salesat least −317 $rare inputs
StatTrak™ AWP | Fever Dream (Field-Tested) instead of StatTrak™ SCAR-20 | Cardiac (Battle-Scarred); StatTrak™ P250 | Mehndi (Battle-Scarred): float at most 0.493113 instead of 0.513422; StatTrak™ P250 | Mehndi (Field-Tested): float at most 0.168029 instead of 0.176522
Craft 1718165
· The CS20 Collection + The Winter Offensive Collection · profit 55.96$
· invest 303.68$
profit on prices without salesat least −295 $rare inputs
StatTrak™ AUG | Death by Puppy (Minimal Wear) instead of StatTrak™ SCAR-20 | Cardiac (Battle-Scarred); StatTrak™ P250 | Mehndi (Battle-Scarred): float at most 0.493317 instead of 0.513422; StatTrak™ P250 | Mehndi (Field-Tested): float at most 0.168114 instead of 0.176522
Craft 1740943
· The Recoil Collection + The Winter Offensive Collection · profit 55.84$
· invest 297.44$
profit on prices without salesat least −293 $rare inputs
StatTrak™ P250 | Visions (Field-Tested) instead of StatTrak™ SCAR-20 | Cardiac (Battle-Scarred); StatTrak™ P250 | Mehndi (Battle-Scarred): float at most 0.506358 instead of 0.513422; StatTrak™ P250 | Mehndi (Field-Tested): float at most 0.173567 instead of 0.176522
Craft 1729836
· The Fracture Collection + The Winter Offensive Collection · profit 55.63$
· invest 298.43$
profit on prices without salesat least −293 $rare inputs
StatTrak™ XM1014 | Entombed (Field-Tested) instead of StatTrak™ SCAR-20 | Cardiac (Battle-Scarred); StatTrak™ P250 | Mehndi (Battle-Scarred): float at most 0.487217 instead of 0.513422; StatTrak™ P250 | Mehndi (Field-Tested): float at most 0.165563 instead of 0.176522
Craft 1742680
· The Spectrum 2 Collection + The Winter Offensive Collection · profit 55.06$
· invest 305.35$
profit on prices without salesat least −305 $rare inputs
StatTrak™ PP-Bizon | High Roller (Field-Tested) instead of StatTrak™ SCAR-20 | Cardiac (Battle-Scarred); StatTrak™ P250 | Mehndi (Battle-Scarred): float at most 0.521973 instead of 0.513422; StatTrak™ P250 | Mehndi (Field-Tested): float at most 0.180098 instead of 0.176522
Craft 1731716
· The Gamma 2 Collection + The Winter Offensive Collection · profit 54.91$
· invest 306.74$
profit on prices without salesat least −301 $rare inputs
StatTrak™ AUG | Syd Mead (Minimal Wear) instead of StatTrak™ SCAR-20 | Cardiac (Battle-Scarred); StatTrak™ P250 | Mehndi (Battle-Scarred): float at most 0.480371 instead of 0.513422; StatTrak™ P250 | Mehndi (Field-Tested): float at most 0.162700 instead of 0.176522
Craft 1726772
· The Dreams & Nightmares Collection + The Winter Offensive Collection · profit 54.45$
· invest 301.26$
profit on prices without salesat least −294 $rare inputs
StatTrak™ MP7 | Abyssal Apparition (Minimal Wear) instead of StatTrak™ SCAR-20 | Cardiac (Battle-Scarred); StatTrak™ P250 | Mehndi (Battle-Scarred): float at most 0.484513 instead of 0.513422; StatTrak™ P250 | Mehndi (Field-Tested): float at most 0.164433 instead of 0.176522
Craft 1736650
· The Kilowatt Collection + The Winter Offensive Collection · profit 54.06$
· invest 303.07$
profit on prices without salesat least −295 $rare inputs
StatTrak™ Zeus x27 | Olympus (Minimal Wear) instead of StatTrak™ SCAR-20 | Cardiac (Battle-Scarred); StatTrak™ P250 | Mehndi (Battle-Scarred): float at most 0.477783 instead of 0.513422; StatTrak™ P250 | Mehndi (Field-Tested): float at most 0.161618 instead of 0.176522
Craft 1741300
· The Revolution Collection + The Winter Offensive Collection · profit 53.53$
· invest 300.54$
profit on prices without salesat least −295 $rare inputs
StatTrak™ P2000 | Wicked Sick (Minimal Wear) instead of StatTrak™ SCAR-20 | Cardiac (Battle-Scarred); StatTrak™ P250 | Mehndi (Battle-Scarred): float at most 0.484513 instead of 0.513422; StatTrak™ P250 | Mehndi (Field-Tested): float at most 0.164433 instead of 0.176522
How to read these numbers
«No higher than» — a guarantee, not a wish. The limits are calculated together: take all items at the upper bound at once — you get exactly what's shown. Take better — you get better.
f' — the same float, scaled to 0–1 by the skin's own range. Same as on csfloat.
Fees. The seller gets the listed price divided by 1.15, not multiplied by 0.85 — the fee is included in the buyer's price.
The outcome can only be sold after a week. Inputs bought on Steam go into the contract right away. The outcome can also be crafted further without waiting, but sell you'll get it in seven days: during the week the price will move, and the number shown is an estimate at calculation time, not cash in hand.
Prices are conservative. Sales are counted at the lower of the lot price and the sale price. Purchases — at the cheapest lot, and that is a lower bound: buying ten you climb the order book. «Check floats on Steam» shows the real purchase price.
