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 Lady Gaga MAYHEM 180g Black Signed Limited Edition Webstore Exclusive Vinyl.
Checkmate users have also been loving these products from Mercari.
Users have been saving products like this to their collections.