How to Trade Up to Sawed-Off | Serenity
Sawed-Off | Serenity drops from Chroma Case, so any contract that can produce it needs 10 Mil-Spec skins from that same case. Here is what the contract costs, what else it can land on, and the input float you need for each exterior.
- Odds per contract
- 25% 1 in 4
- Contract cost from
- $3.70 10× cheapest input
- Expected value
- $1.95 mean of the outcome pool
- Margin
- -47.3% $-1.75 per contract
Buying is cheaper than rolling. A Field-Tested Sawed-Off | Serenity costs $1.84 outright, against $3.70 for a contract with a 25% chance of producing one. Trade up for the process, not the value.
The contract
10 inputs, all Mil-Spec, all from Chroma Case. Concentrating every input in one case is what keeps your odds at 25% — mixing cases splits the probability across both pools and lowers your chance at Sawed-Off | Serenity specifically.
MP9 | Deadly Poison
MP9 | Deadly Poison
XM1014 | Quicksilver
MP9 | Deadly Poison
XM1014 | Quicksilver
SCAR-20 | Grotto
XM1014 | Quicksilver
SCAR-20 | Grotto
M249 | System Lock
SCAR-20 | Grotto
XM1014 | Quicksilver
M249 | System Lock12 further eligible inputs are available — open the reverse trade-up calculator to price a full contract against your own inventory.
What else this contract can land on
A contract from Chroma Case draws uniformly from every Restricted Shotgun skin in the pool, so Sawed-Off | Serenity is one of 4 equally likely results. These are the other 3.
| Outcome | Odds | Cheapest price |
|---|---|---|
| Dual Berettas | Urban Shock | 25% | $2.18 |
| MAC-10 | Malachite | 25% | $1.92 |
| Desert Eagle | Naga | 25% | $1.85 |
| Sawed-Off | Serenityyour target | 25% | $1.84 |
Input float for each exterior
CS2 normalises float across a trade-up: each input’s float becomes a 0–1 position inside its own range, those are averaged, and the average is applied to Sawed-Off | Serenity’s range of 0.00–0.50. To land a given exterior, your ten inputs must average the normalised float below.
| Target exterior | Output float | Required avg. input float |
|---|---|---|
| Factory New | 0.0350 | 0.0700 |
| Minimal Wear | 0.1100 | 0.2200 |
| Field-Tested | 0.2650 | 0.5300 |
| Well-Worn | 0.4150 | 0.8300 |
| Battle-Scarred | 0.4750 | 0.9500 |
“Not reachable” means Sawed-Off | Serenity’s own float range never enters that exterior band — no combination of inputs can produce it.
What Sawed-Off | Serenity is worth right now
Worth comparing against the contract cost above before you commit: buying the skin outright is frequently cheaper than rolling for it.
| Exterior | Price | vs. contract cost |
|---|---|---|
| Field-Tested | $1.84 | −$1.86 |
| Battle-Scarred | $2.30 | −$1.40 |
| Well-Worn | $2.35 | −$1.35 |
| Minimal Wear | $2.57 | −$1.13 |
| Factory New | $4.31 | +$0.61 |
Build this contract
Price a full ten-slot contract against live inputs, set your own float values, and see the outcome odds update as you go.