Funny how he goes to the trouble of showing a close up of the engine number, without actually restoring anything.
Either he's trying to bait us into making him an offer he can't refuse, in which case why not just say so, or he's doing this simply because he's smug about what he bagged for a pittance, knowing full well it's a sandcast, but doesn't want his wife's friend seeing this and realizing he's been had.