i kinda wish we had a trading/selling forum here sometimes but i dont think my suggestion there was well received. we'd be hard pressed to monitor it at best, and we can't really step in or do anything if a deal goes sour.
but on that note, i'd rather buy/sell/trade with people on here that i know appreciate and value the things like i do and would take care of them.
i sell and trade a lot of br.com and they have a whole subforum for user marketplace as it were, and it can't be seen unless you are a member and they have set up pretty decent rules for it. i know some people who post here, post there also