Evil eBay
Some scammers have some pretty smart schemes on how to trick other people. One of these is through using their ratings, like the one in this story. Essentially, they’ll start off by selling lots of meaningless stuff for cheap in order to get lots of 5-star ratings and boost their profile.

Either they’ll actually sell the product, or they’ll use fake accounts to buy them and rate the user. Once they’ve got enough ratings, they’ll list a high-value product for cheap. Most people will see the user’s ratings and assume they’re legitimate – but no! The scammer will take their money and run with it.