Grading with gamestop? : r PokeGrading GameStop will buy and sell rare Pokmon cards but it doesn't want to catch 'em all The Verge ACE 10 CERTIFIED GEM MINT 2015 BREAKTHROUGH M MEWTWO EX HOLO POKEMON CARD or 1250 Rev Comps I Got My Graded Pokemon Cards Back from GameStop (worth it?) GameStop recently honored a trade in worth $30,000 after accepting a 2003 Pokemon card from a customer. It was the most valuable GameStop trade in ever, according to the retailer. Click the link in