CS2 trade up finder: mixed collections and target skins
Two things the single-collection finder cannot do: scan every two-collection mix (the best split of 10 inputs between two collections, every rarity and wear, at live prices), and target a skin – pick the skin you want and see every contract that can roll it, from the highest-chance pure contract to the cheapest mix. Set your price source, fee and float assumption; open any result in the calculator.
How the mixed-collection finder works
- For every collection, rarity and wear it picks the cheapest input skin at your price source (the same rule as the single-collection finder).
- For every pair of collections it tries every split – 1+9, 2+8 … 9+1 (1+4 to 4+1 for knife contracts) – and keeps the split with the best ROI.
- Outcomes come from both collections in proportion to the inputs; every outcome is priced live at the predicted float, and EV, ROI and chance of profit are computed after your fee.
- Pairs where neither side is close to break-even on its own are skipped, so the scan finishes in a few seconds in your browser.
Target a skin turns the search around: it fixes the target’s collection as one side and tries every other collection as the filler, then ranks the results by cost per 1% chance of the target.
FAQ
How does mixing collections change a trade up?
Each input adds its own collection to the outcome pool: with 7 inputs from collection A and 3 from collection B, 70% of the chance goes to A’s higher-rarity skins and 30% to B’s. Mixing in a cheaper collection cuts the cost of the contract, but also cuts the chance of the outcomes you actually want in the same ratio.
How do I find the cheapest way to get a specific skin?
Switch to “Target a skin”, type its name and the finder lists every contract that can roll it: 10 inputs from its own collection (the highest chance) and every mix with a cheaper collection, sorted by cost per 1% chance of that skin.
What does “low floats” mean?
By default the finder assumes each input has a float in the middle of its wear range, which is what the cheapest listing usually has. “Low floats” assumes you buy inputs in the lowest tenth of the wear range, which gives better-wear outcomes – but you have to find such listings, and they can cost more than the wear’s lowest price.
Why is the chance of profit low on many mixes?
A mix often pairs an expensive collection with a cheap filler. The filler’s outcomes are worth little, so most rolls land there and lose money, while the few rolls that hit the expensive collection carry the expected value. Sort by chance of profit if you prefer steadier contracts.
Are the floats and prices exact?
No. Prices are the lowest listing per wear at the price source you choose and floats are assumed, so open the contract in the calculator, enter the real floats of the copies you can buy and check the live listings before you trade.