So they have an auction. I poked my head in there last year. And many years ago at Gencon 2004, I hung out with a distant cousin who spends a lot of time at the GenCon auction. I might try it out. There is some old TSR stuff I'd like to get my hands on if it's available. Sure we have Ebay and Amazon Marketplace, but an old fashioned auction could be fun.
So do they provide a listing of what's available and approximate times that bidding will start? I can't remember from last year because I didn't really research GenCon much before attending.