I would be willing to moderate or help, but I have been getting really irritated in marketplace and auctions:
1. Require Asking Price, negotiable or not, in any subforum for anything you are selling except auctions
2. Require auction terms
- Start/Stop
-Bid increment
-etc.
3. Maybe sub forum for those checking prices
4. Selling Hints (Sticky) - Pictures with date and forum name, Escrow through who or running list of those available/trusted and costs, shipping terms, payment terms etc.
It seems a lot of people get scammed or crap usesles threads are created with little to no info and a lot of BTC flows through the Marketplace here, you can't prevent all scamming, but at least standardize. I've seen it work on other forums and it would work here to require certain elements to the post and if they aren't there PM the user and post with a time frame to fix or it will be deleted.
I don’t understand what you're asking exactly. You want them to implement some kind of in-built crypto-ebay or something? The marketplace isn't ideal but I don't think it's meant to be a perfect market - it's there if you want to use it and use it at your own risk. And a warning about escrow is already stickied. People don't read it anyway. If people post threads of crap just don't buy something from them or tell them where they're going wrong.