It's practically brand new (I can get it with no fingerprints and stuff) and comes with 1 year warranty (and you can keep renewing that warranty if something breaks with the DS).
At EBgames/Gamestop, the preowned one is $100 so I guess that's kind of worth it?
At EBgames/Gamestop, the preowned one is $100 so I guess that's kind of worth it?