So basically the 500k$ is a bait that he hopes will fish in a moron, OR you can send him an offer. Yeah, I agree, he shouldn't put up that half a million price if that's not what he's expecting to sell it at... I mean, most people will just look at the auction and laugh at the guy.
Which reminds me... that auction, some time last week, was a normal bidding auction, but it was stopped early during the bidding and it went back to this buy it now price. Kinda weird.