The 2021 Train collection is a CS2 weapon case collection containing 17 skins across 4 rarity tiers. There are currently 1,565 active listings across CSFloat, DMarket, and Skinport. The collection features in 196 profitable trade-up contracts, Browse skins, compare prices, and find trade-up opportunities below.
Collection trade-up research
The 2021 Train Collection matters for trade-up planning because collection membership changes the output pool, not just the cosmetic theme. A contract using 2021 Train inputs can roll next-rarity skins from this collection according to the collection weights represented by the 10 input skins. That makes rarity depth, listing supply, float ranges, and floor prices important signals when comparing contracts. Use the rarity sections below to see how many skins are available at each tier, which weapons appear in the collection, and where the cheapest active listings start. For profitable trade-ups, CSAlpha combines these collection details with real marketplace prices, deterministic output-float math, CSFloat, DMarket, and Skinport data, then links the live opportunities on the dedicated collection trade-up page.
