Checkmate is a savings app with over one million users that have saved $$$ on brands like StockX.
The Checkmate extension automatically applies StockX discount codes, StockX coupons and more to give you discounts on products like Squirtle 1999 Pokemon TCG Base Set 1st Edition #63/102 (PSA or BGS Graded).
Checkmate users have also been loving these products from StockX.
Users have been saving products like this to their collections.