I've got tons of computer games fairly used do you buy those or know anyone that does and also baseball cards

Try Disc Replay they will most definitely take those but not the baseball cards

Killen's exited the PC games market. Steam, Origin, and GOG have killed used PC gaming. Also, there's currently no place in Springfield that deals in sports cards.

Its usually best to call them directly. This is but a mere user forum. You may also want to check out recycled records. I know they buy all kinds of stuff.