USP-S | Serum: trade up odds, float & price

Classified Pistols skin from the Arms Deal 2 Collection. Float range 0.00 – 0.25, available in Factory New, Minimal Wear, Field-Tested. You can get it from a trade up of 10 Restricted skins of the Arms Deal 2 Collection with a 50% chance per contract.

USP-S | Serum price by wear

Wear	Float	Price	StatTrak™
Factory New (FN)	0.000 – 0.070	$67.93	$80.44
Minimal Wear (MW)	0.070 – 0.150	$53.36	$76.85
Field-Tested (FT)	0.150 – 0.250	$51.04	$53.31

Price check, 2026-11-11: the cheapest USP-S | Serum is Field-Tested at $43.11 on CS.MONEY. Factory New costs $59.11, 1.4× as much. StatTrak™ costs 1–1.2× the normal price. On the Steam Market the Field-Tested sells for $51.04, 18% above the cheapest marketplace listing.

How to trade up into the USP-S | Serum

Put 10 Restricted skins from the Arms Deal 2 Collection into a trade up contract. The collection has 2 Classified skins, so with all 10 inputs from this collection the Serum has a 50% chance (the other outcome is P90 | Cold Blooded). Mixing in another collection lowers the chance in proportion to the inputs you replace.

Inputs (Restricted): Dual Berettas | Hemoglobin, Five-SeveN | Case Hardened, MP9 | Hypnotic, Nova | Graphite.
Factory New result: average normalised input float ≤ 0.2800.
Minimal Wear result: average normalised input float ≤ 0.6000.
Output float: 0.00 + average × 0.25 – see the float guide.

Cheapest USP-S | Serum trade ups right now

10 identical Restricted inputs from the Arms Deal 2 Collection at today’s prices. Every contract below has a 50% chance of this skin – open one to change floats, wear or fee.

Contract	Cost	EV	ROI	Chance of profit
10× Five-SeveN \| Case Hardened FT Restricted → Classified	$123.00	$94.85	-22.9%	50.0%	Open in calculator
10× Nova \| Graphite FN Restricted → Classified	$106.40	$66.27	-37.7%	0.0%	Open in calculator
10× Five-SeveN \| Case Hardened BS Restricted → Classified	$112.70	$66.89	-40.6%	0.0%	Open in calculator
10× Five-SeveN \| Case Hardened WW Restricted → Classified	$113.90	$66.27	-41.8%	0.0%	Open in calculator
10× Nova \| Graphite MW Restricted → Classified	$131.10	$66.89	-49.0%	0.0%	Open in calculator
10× Nova \| Graphite StatTrak™ MW Restricted → Classified	$165.60	$72.30	-56.3%	0.0%	Open in calculator
10× Nova \| Graphite StatTrak™ FN Restricted → Classified	$210.60	$73.35	-65.2%	0.0%	Open in calculator
10× Dual Berettas \| Hemoglobin StatTrak™ FT Restricted → Classified	$235.10	$72.30	-69.2%	0.0%	Open in calculator

Steam Market prices, snapshot of 2026-09-27 (USD, before fees); the table refreshes with live prices on page load. Knives and gloves above Steam's $2,000 listing cap use the lowest marketplace price.

Build a contract for the USP-S | Serum
Open in the calculator (auto-builds the cheapest contract)