Do they buy old pokemon cards?yugioh cards? Basketball and baseball cards?

Do they buy Pokemon cards

Pokemon and Yu-Gi-Oh cards yes, sports cards are a no. They'll buy them for 50% market value, unless you want in store credit, in which case they'll give you 65% of market value. Though this doesn't sound great, it's one of the higher percentages you'll find out there when selling to a game shop.

Yes on the pokemon and yugioh. No on the basketball baseball. But the trade off is bad. You'd break closer to even if you sell on eBay.