In 2008, eBay.it began using detailed seller ratings with four different categories. When leaving feedback, buyers are asked to rate the seller in each of these categories with a score of one to five stars, with five being the highest rating and one, the lowest. Unlike the overall feedback rating, these ratings are anonymous; neither sellers nor other users learn how individual buyers rated the seller. The listings of sellers with a rating of 4.3 or below in any into the four rating categories appear lower in search results. Power Sellers are required to have scores in each category above 4.5. More information on Wikipedia.