Except that it's not actually an auction. I made the same mistake (hey, it's EBay), but there's no place to enter a bid and if you look down at the bottom it says:

"This listing is an advertisement. There is no bidding! If you are interested in this property, you may contact the seller/agent to request additional information."

Which is probably smart. If it were an auction, it'd have eleventy-million fake bids by now.

It also tends to indicate that this is a real property. If it was just someone goofing around, it'd be an auction. That's not strong evidence, but it's certainly an indication.