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 NEW Ariana Grande Excuse Me, I Love U Crewneck.
Checkmate users have also been loving these products from Mercari.
Users have been saving products like this to their collections.