I know in some other forums I am on your thread will be deleted unless you post a firm price in your post. In said forums, you are allowed to sell for less so you do sometimes get people making offers and others one-upping them.
I agree wholeheartedly with this post.
EDIT: Would a requirement for For Sale threads that are set up as auctions to have a deadline help? I mean, maybe allow for auction sale threads but 7 Calender Days after the thread is started, it is locked and the highest offer stands. Perhaps an "auctions" sub-forum? I'm sure there is a vBulletin plug in or script that could make this forum automated to decrease the added strain on mods..
2014 BMW 435i XDrive M-Sport - Delivered May 2014
2007 BMW 323i - Delivered April 2007