M4A1-S | Chantico's Fire trade-up: building a basket — CS2Collections.net

Turnkey trade-up: M4A1-S | Chantico's Fire (Factory New)

A ready set of 10 live listings with floats: the average input float lands in the range you need, and every lot comes with its price and a buy link. Inputs are taken in Factory New.

Input cost $0.00
Expected return
ROI
Chance of profit
Lots in basket 0 / 10
Markets 0
Collected 0 of 10 lots

The markets do not have enough lots with a suitable float. We do not invent items: you only see what is actually on sale right now.

  • UMP-45 | Primal Saber — found 0 of 10

Input float and threshold

Average lot float 0.000000
Average normalized float 0.000000
Required range 0.0000 … 0.0707

The range is chosen so that every possible outcome of the contract lands in the wear you want.

Outcomes with this basket

2

How to repeat it

  1. 1

    Buy the lots via the links

    Take exactly the lots from the table: every item's float moves the result. If a lot is already sold, hit "Refresh listings" and rebuild the basket.

  2. 2

    Wait for delivery

    Items land in your Steam inventory after the trade with the market. Fresh items sit under a trade hold — you can only build the contract once all ten are yours.

  3. 3

    Build the contract in game

    In CS2 open your inventory, pick "Trade Up Contract" and add all items. Check that the average float matches the number above, then confirm the trade.

FAQ

How is the basket built?

We pull live listings for every input skin of the contract, keep the ones whose float falls into the wear you need, and look for the cheapest set of ten items whose average normalized float stays inside the required range. We start from the cheapest lots and then swap them for less worn ones until the constraint holds.

Why does the average float matter so much?

The result float is min + (max − min) × average normalized input float, where each item's normalized float is its position inside its own wear range. That is why a single high-float item can push the result into the next wear tier and collapse its price.

Is this guaranteed profit?

No. The result float is predictable, the outcome is not: you get a random skin from the collection pool with the odds shown in the table. Expected return is an average over many contracts — a single trade can hand you the cheapest outcome.

What does it cost?

Nothing. Basket building, EV and ROI math, outcome odds and lot links are free and need no account — a free alternative to paid trade-up calculators such as TradeUpSpy.