if you look at the bid activity bidder 6 and bidder 4 have 100% and bidder %74 activity with this seller. (they only bid at this guys auctions) I'ld say this is definitely fraud. Who on earth signs up to bid $500 on a 20 year old computer ?
He's just trying to create the image (oh this item is so precious) to give it as a reference for future auctions. (this stuff has been sold at ebay for $500, but now I'm giving you a $300 buy it now)