- Cost
- $6.42
- EV
- 27%
- $1.75
- Profit
- −$4.90
- after fee
- Win %
- 0%
- to profit
Avg float ≤ 0.121 (needs < 0.123)5 outcomesActive market
Reverse trade-up finder
Trade up to Desert Eagle | Serpent Strike
10 Mil-Spec Grade skins from the Fever Case collection can become Desert Eagle | Serpent Strike. Pick a wear to see every realistic route, its odds, cost and the input float it needs.
Prices as of Oct 27, 2026Steam Community Market averages · snapshot 2026-10-27 10:25 UTC
Factory New Desert Eagle | Serpent Strike needs an average normalized input float below 0.1228 (output float 0.000–0.070). Best chance per contract: 20.0%.
- Cost
- $102.20
- EV
- 57%
- $58.66
- Profit
- −$51.19
- after fee
- Win %
- 40%
- to profit
Avg float ≤ 0.122 (needs < 0.123)8 outcomesSome thin prices
- Cost
- $4.47
- EV
- 34%
- $1.54
- Profit
- −$3.13
- after fee
- Win %
- 0%
- to profit
Avg float ≤ 0.123 (needs < 0.123)10 outcomesActive market
- Cost
- $6.20
- EV
- 57%
- $3.54
- Profit
- −$3.12
- after fee
- Win %
- 20%
- to profit
Avg float ≤ 0.122 (needs < 0.123)10 outcomesActive market
- Cost
- $4.38
- EV
- 33%
- $1.44
- Profit
- −$3.13
- after fee
- Win %
- 0%
- to profit
Avg float ≤ 0.122 (needs < 0.123)10 outcomesActive market
- Cost
- $8.25
- EV
- 97%
- $7.97
- Profit
- −$1.32
- after fee
- Win %
- 18%
- to profit
Avg float ≤ 0.122 (needs < 0.123)10 outcomesActive market
Required input float for each Desert Eagle | Serpent Strike wear
| Wear | Output float | Avg normalized input float | Cheapest route | Best chance |
|---|---|---|---|---|
| Factory New | 0.000–0.070 | < 0.1228 | $4.38 | 20.0% |
| Minimal Wear | 0.070–0.150 | ≥ 0.1228 and < 0.2632 | no priced route | — |
| Field-Tested | 0.150–0.380 | ≥ 0.2632 and < 0.6667 | $0.81 | 20.0% |
| Well-Worn | 0.380–0.450 | ≥ 0.6667 and < 0.7895 | no priced route | — |
| Battle-Scarred | 0.450–0.570 | ≥ 0.7895 and any | no priced route | — |
The average is over every input's float normalized to its own range. Output float = 0.00 + average × 0.57.
Other trade-up targets in this collection
How CS2 trade-up contracts work
Inputs & odds
10 skins of one rarity become 1 skin of the next rarity (Mil-Spec → Restricted → Classified → Covert). Since the October 2025 update, 5 Covert skins can become a knife or gloves from those skins' case. Each input collection gets its share of the odds (inputs from it ÷ total), split evenly across that collection's next-tier skins.
Float math
Every input float is normalized to its own skin's range — (float − min) ÷ (max − min) — and averaged. Each output's float is its min + average × (max − min), so a restricted-range skin like 0.10–0.20 can only land in the wears its range allows.
Prices, fees & freshness
Values are Steam Community Market averages from the snapshot dated on each page. Profit subtracts the ~13% Steam seller fee. StatTrak™ inputs give StatTrak™ outputs (knives only — gloves have no StatTrak™). Map collections outside weapon cases aren't in DropLabz's dataset yet.
Pick the skin you want in the reverse trade-up finder, check any contract in the trade-up calculator, or compare with opening cases on case ROI and knife odds.