This marketplace is full of scam artists and people that are overcharging for everything that they list. At least half of the used stuff on here is listed for more than what it costs brand new. When you are looking for something in a given category, the listings of the same people tend to pop up consistently, and there is no way to block dishonest sellers to keep them from appearing in searches. Mercari has no customer service dept, and there is no way to report spam listings.