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 Pokemon Card Binder With 50 Sleeves Can Hold Between 200-400 Cards Gengar New!.
Checkmate users have also been loving these products from Mercari.
Users have been saving products like this to their collections.