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 te could sell them on ebay o something o 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 o any other auction website is a good option. If te have a swap meet o something locally, te can also sell them there. o te could donate them to Goodwill o any other charity organization.

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