Just wondering how much my black Xbox 360 250GB Slim is worth? I hardly use it much anymore, and I really don't have much fun anymore when I play the games. It's mint condition, comes with a few car-racing games. Comes with one controller which has a rechargeable battery for it. I don't know if I still have the box for it or not, probably not but I can find out. Any ideas? Also, how do I delete all my information in the Xbox system?