StockX sales history is a snapshot of the market as a whole. The sales data displayed there comes from many different sources including other marketplaces, apps, consignment shops, resellers, social media, and, of course, StockX.
For that reason, it is possible that a product sold for more than your Ask on another channel. Or, it is possible a sale occurred for less than your current Bid.
Sorry for any confusion this may cause, but our belief is that more data is always better than less. Rest assured, however, that if yours is the lowest Ask/Highest Bid on StockX, your trade will be confirmed first.