I know this was sort of summed up by the end of your post, but if you make a minimum post count, that's just going to move the garbage posts and spread them out all across the forum so that people are able to get into the classifieds. It's been effective on other forums, but the only people it's really going to stop is the handful of lazy idiots that aren't willing to post jibberish in other forums to increase postcount, or the idiots that post jibberish so that they can get into the classifieds by increasing their postcount. It's a catch 22 though if you ask me.