@AdultKing,
The forum boards don't run auction.
http://Bow.To is an auction site like flippa. Makes it easier than getting random little offers on boards.
There is even a feature for buyers and sellers to verify their phone number, ownership of the sites/domains, and a rating system for buyers and sellers. Those forum boards do not offer.
With those measures in place, only serious buyers and sellers will post listings.
I believe there is a market for it. The site is discreet because buyers and sellers don't give out their names. The only thing you will know about the buyers and sellers on
http://bow.to is the website/domain name and username (which can be anything). You will not see their names, email address or phone number (I don't collect that stuff).
Only way you will know the names of the people selling and buying is when a buyer/seller doing a transaction via escrow after winning an aution (I think that's very discreet)