Vendors padding their feedback generally post a low priced listing, purchase them from any number of buyer accounts created for this purpose, then change the price of the item to make it look like a large number of people bought it and they look legit. This is countered by the feedback score, however, which is determined by 'buyer weight'; you can read more about that here: http://dkn255hz262ypmii.onion/wiki/index.php?title=Feedback_Score Libertas