Checkmate is a savings app with over one million users that have saved $$$ on brands like Mercari.
The Checkmate extension automatically applies Mercari discount codes, Mercari coupons and more to give you discounts on products like 2002 Shining Mewtwo — PSA 10 — Pokémon TCG.
Checkmate users have also been loving these products from Mercari.
Users have been saving products like this to their collections.