I understand that's the norm in Australia -- at least, according to my sister, who lives there now. You might want to Google some Ausie real estate sites to see if there's anything useful.

My two cents -- If you're trying it in the U.S., since folks aren't really familiar with the whole concept/process, I'd be VERY clear in my instructions and explanations. Things like inspections, open house viewings, measurements, disclaimers, closing requirements, fees over and above the auction price.

I've seen them advertised around here, usually estatesales. The minimum price set I've seen has been what they'd want for it on the MLS, i.e. not a particularly bargain price so I haven't attended any. Its seems more like they're hoping for a fast sale or a bidding war but if not just put it on the MLS. So why go stand in the cold unless I'm want it so bad I'm willing to pay over the asking price?