The whole posting a certain amount before you can sell something doesn't really work. It seems good in theory (like communism), but it doesn't work. You should verify who seller's are. That might help some.
Also warez attracts the wrong crowd 99.9% of the time and although it's nice having "evaluation" copies, it really does attract leechers and people that would do anything to get to it...like posting in every post, "Sorry for writing this but I need to get to 15 posts".
Sharing is what makes a good community, being able to sell if you want is an added perk, but anonymity (for the seller) for the products they sell unless they are illegal shouldn't be a necessity.
I actually like this community better than some of the larger BH communities because it's not a constant flame war. I like flame wars but when it kills 80% of the good reads, it hurts the whole community and this place is pretty laid back.