What it does
Buff163 (operated by NetEase in China) is the highest-volume CS2 marketplace by far. Buff prices set the global market floor for many items. Their public-facing site is in Chinese; English UI requires a translator extension. Trades are Steam-mediated so non-Chinese users can buy and sell with the right setup.
No public API — third-party tools (including Pricempire) aggregate Buff prices via partnerships or scraping.
Pros & cons
Pros
- Highest volume worldwide
- Sets the global price floor for many items
- Lowest fees in the market
Caveats
- Chinese-only UI
- No public API — third-party aggregators only
- Withdrawal/payment friction for non-Chinese users