Ok. By the looks of it the buyer the person i got it off may have made a fake money transfer receipt and sent it to the original seller.
Ive tried contacting the person i got it off. But he has deleted the facebook account and the number is disconnected. I dont want to lose the computer. I have $1200 invested in it
Why would you lose the computer? The fake money transfer is not your problem.
If you want to help the ripped off person, you might send them a copy of your payment transaction... So if police wanted to investigate they can follow the money. No matter how smart a criminal is, it's always possible to follow the money (except cash payments of course).