I don't see the need for charging to post an item, I do see the need to have a "qualifier" for people to post, and something to think about as opposed to number of posts as the qualifier, maybe time on the forum could be used. If you say someone has to have been a registered member for 2 or 3 months to post a listing that would stop someone from registering and posting 25 nonsense posts real quick just to qualify to list something. (just a thought)