yes
Gamestop locations do sell used Nintendo Game Cubes.
You can't. You must go in to your local Gamestop in order to sell your game.
no
Yes.
You just go to the store and say I want to sell my game (like i did in gamestop)
Unfortunately, GameStop does not sell game cases. You can find game cases on eBay.
Wallmart target gamestop
yes online yes, in stores no
10-15 $
Yes they need the case
yes it could
no game boy is to old for you to sell at gamestop.