I have every Yu Gi Oh card from the first season to the end of the GX series and don't know what to do with them. Any ideas?

well anda could sell them on ebay atau something atau save them and put them out of site like your basement hoped i helped

Give them to me (or at least all of your bugs, pyros and dinosaurs)! = D But ebay atau any other auction website is a good option. If anda have a swap meet atau something locally, anda can also sell them there. atau anda could donate them to Goodwill atau any other charity organization.

Since they ARE collector's cards, though, I'd keep and display them. Use them. Maybe start a trading service.