[dagw]

Only if you assume peoples situation and desires are static and that their ability for forward planning is perfect and rational. I might not be that interested in going to Burning Man 6 month out, but as the date approaches and I hear about how a whole bunch of people I know will be there then all of a sudden I'm much more willing to pay.

Or at the time of the auction I'm unemployed and worried about paying rent, then I might only be able pay $100. Then three month later I'm offered a job with a great salary, and now I'm all of a sudden willing to pay $500-600.

No matter how you structure things, there will always be people whom are willing to pay more after the fact, and as long as there is a market someone will find a way to sell to the market.