This is a scam.
The wallet is fake, it has been made up.
There is no bitcoin on the blockchain associated to this wallet.
I am not attempting to confirm nor deny Yogg's statement. I just want to add that OgNasty has offered in the past to do escrow service. If you are going to buy, please use do so safely with escrow. Source:
https://bitcointalk.org/index.php?topic=5051064.msg46932020#msg46932020