Maybe I'm nuts, but this does sound commercial to me:
http://forums.teamestrogen.com/showp...48&postcount=7
I think those friends should all be selling off their own used bikes if they want to sell them here.
If you enjoy the TE forums aside from the 'for sale' ads issue, then you should stay even if you wind up being asked to stop selling other people's stuff here. I'm sure no one wants to see you leave altogether. Like most of us here, you can continue to contribute constructive and helpful input in the forum even without selling things.