Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
I hate scammers, but you also have to be a bit less of a sucker yourself. First, it was very likely to have been stolen if it had been real, and second, you NEVER buy something off the street without seeing what's in the box and whether it works.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.