Rep Power: 317

I got this from my friend because he owed me some cash. Tried to trade it in at Gamestop and they told me its "banned" and they can't take it. I must of missed something, but the guy was like "sell it on ebay". Searched on ebay and it looks like bunch of people are selling it there, so I thought I'd give it a shot here first.
Looking for $30 shipped (guy at Gamestop said that they used to take them in for $27, so I figure $27 + $3 shipping). There are some scratches on the bottom, but it works fine, I played it this past week.