That listing caught my eye earlier today. I like the idea of trying something new to add to the marketplace...several thoughts on this (in no order of importance)
1. Nice to see somebody try to add something new...
2. I would prefer not to give my email with my bid and keep all board transactions to my pm box here to keep everything in one place and my email to my email account... (not a deal breaker but this is a minor inconvenience for me).
3. To be in the spirit of what I read the marketplace rules to be, each listing should have a buy it now...some price with which the seller will end the auction and the boardie wins the book (this seems to be the case in the listing linked above).
4. Similar to number three, only board members would be allowed to bid (the exclusive offering rule). I believe this again is the case here as he mentioned the auction was developed specifically for the marketplace threads.
Overall, I would probably give placing a bid it a try if it winds up being permissable from the mods point of view...