Really don't think it' appropriate to use the classifieds here for business purposes. It's one thing to put you surplus up, and give the members a chance at a sweet deal, occasionally, but something else when it's continual. There are plenty of other sites for selling stuff for profits, and the people doing this for a steady income should be taking it there.
It's a bummer that there has to be rules, and someone has to take time to monitor and correct people who take advantage. Hope there is a simple solution to all this, but doubt it. How would you know when a thread is no longer active, all items sold and shipped? If the deal doesn't complete, will be reactivated? Anyway to prevent a thread from becoming a store front?
Also noticed that a lot of the items lately, have little to do with metal detecting, not equipment, not things found, although usually made of metal. Would restricting it to mostly hobby related solve some of the problem?