Caveat Emptor

If you've been watching the news, you know that Microsoft banned a crap-ton of XBox Live users for hacking their systems.

Those systems are starting to show up on places like Ebay and Amazon. While you could play games on them, the machines themselves are perma-banned from XBox Live, so forget using the internet or downloading anything with them.

If you go to buy one, be sure to take Ebay's advice and use Paypal or a similar service where you can dispute the purchase if the seller lied about the Xbox not being banned.

Source