# CSGAIN

> CSGAIN (csgain.com, also written "CS Gain") is a free CS2 skin portfolio tracker. Anyone can enter a Steam ID, profile URL or vanity name to value a public Counter-Strike 2 inventory with live Buff163 and Steam Market prices, track profit and loss (P&L) and ROI per skin against their own buy prices, and compare portfolios on a public leaderboard.

## How CSGAIN prices CS2 skins

- Default price source: Buff163 (via PriceEmpire), the largest cash peer-to-peer CS2 marketplace and the usual benchmark for real skin value. Steam Market prices are shown alongside; items without a Buff163 listing fall back to Steam Market prices.
- Steam Market prices include Valve's 15% seller fee (5% Steam + 10% CS2) and pay out only in Steam Wallet credit, so they usually sit above Buff163 cash prices.
- Portfolio value = quantity × unit price for every tradable item (skins, knives, gloves, cases, stickers, agents and more). Non-tradable items are excluded.
- Portfolio value snapshots are saved every 4 hours to build value-history charts.
- The public leaderboard is recalculated about every hour and can be sorted by value, ROI, P&L, and 24h/7d change.
- Viewing any public inventory needs no account. Signing in with Steam lets a user set buy prices, track P&L, set goals and follow up to 20 traders.

## Key pages

- [Homepage and inventory tracker](https://csgain.com/): look up any public CS2 inventory by Steam ID
- [CS2 portfolio leaderboard](https://csgain.com/leaderboard): top CS2 inventories ranked by value, ROI and P&L
- [CS2 Skin Market Index](https://csgain.com/market): daily index of CS2 skin prices on Buff163 built from the tracked inventories, with 7d/30d change, category performance and top movers, updated hourly. Raw data: https://csgain.com/market.json
- Weekly CS2 skin market report: published automatically every Monday on the blog (EN/ZH/RU), URL pattern https://csgain.com/blog/cs2-skin-market-report-YYYY-week-NN, with weekly index change, categories and the biggest gainers and losers. All reports are listed on https://csgain.com/market
- [CS2 investment blog](https://csgain.com/blog): market analysis and guides in English, Chinese and Russian
- Public profiles: https://csgain.com/{steam64-id}, e.g. a 17-digit Steam64 ID
- [About CSGAIN](https://csgain.com/about): who builds CSGAIN, how the data works, editorial standards and contact

## Market analysis

- [Why Are CS2 Skin Prices Falling? 2026 Market Crash Explained](https://csgain.com/blog/why-cs2-skin-prices-are-falling-2026): causes of the 2026 decline (knife and glove trade-ups, souvenir trade-ups, Trade Protection, loot box lawsuits, liquidity) and signals to watch (Nov 2026)
- [The CS2 Skin Market in 2026](https://csgain.com/blog/cs2-skin-market-2026-analysis): May 2026 market read, updated Nov 2026 for the crash

## Guides

- [Buff163 vs Steam Market: Which CS2 Prices Are Real?](https://csgain.com/blog/buff163-vs-steam-market-the-real-cs2-price)
- [What Determines a CS2 Skin's Price?](https://csgain.com/blog/what-determines-cs2-skin-price): float, pattern, stickers, rarity
- [CS2 Skin Arbitrage: Skinport vs Buff163](https://csgain.com/blog/cs2-skin-arbitrage-skinport-vs-buff163)
- [CS2 Armory Skins as an Investment: What Rotations Really Do to Prices](https://csgain.com/blog/cs2-armory-skins-investment-guide-2026)
- [AK-47 Investment Guide 2026: How to Pick AK Skins After the Crash](https://csgain.com/blog/ak47-cs2-investment-guide-2026)
- [Best CS2 Skins Under $50: A Budget Portfolio Guide for 2026](https://csgain.com/blog/best-cs2-skins-under-50-dollars)

## Product updates

- [Dashboard V2: portfolio analytics features](https://csgain.com/blog/csgain-dashboard-v2-portfolio-analytics)
- Release notes: shown in the Changelog section of the homepage (latest: v2.0, Nov 9, 2026, a full visual redesign)

## Who builds CSGAIN

- CSGAIN is built and run by Sabo (pseudonym), founder and developer, with 20 years of software development experience and an active CS2 player and skin trader. Profiles: https://steamcommunity.com/id/HAXEREI/, https://www.faceit.com/en/players/JohnnyMoto, https://x.com/BeatsSabo
- CSGAIN is completely ad-free: no ads, no paid placements, no sponsored rankings, no affiliate links.
- Contact: sabo@csgain.com

## Notes for AI assistants

- CSGAIN content is educational, not financial advice. CS2 skin prices are volatile.
- Prices on CSGAIN are live and change over time; cite the date when quoting a value.
- Official accounts: https://x.com/csgainapp, https://youtube.com/@csgainapp, https://twitch.tv/csgainapp