No from me also.
I think if we had an auction section here there wouldn't be enough people regularely watching it to get any decent bids. You'd probably have to start with a minimum bid price and at that point you might as well list something for sale for whatever you want for it.

It could be good tho for stuff that people really don't want much for if there was some way of enforcing the bidders. Every time I see something listed with no price and best offer I never bother contacting because 99.9999999% of the time that person has a price in mind and it's usually going to be more then a lot of people would want to pay.