From a moderation perspective, I would like to have forms with fields of required information for threads and posts of the Vendor Feedback and Marketplace subforums. An area of "free text" could be used for frequent posters who cut and paste their ads, as long as they still filled the rest of the form.
This would fix the problem of ads with no price, VF with no transaction date, etc. I'm not sure how flexible vbulletin is, though. One can hope.