I whish I lived in USA at least when it comes to electronics and 2nd hand market. But Sweden is a small market for HiFi and you get nothing, almost, for 2nd hand gear. Especially suspicious speakers with built in electronics that few have ever heard of!!

There is nothing wrong with the speakers and the asking price for both are USD 5600,- if they have not done some error misprinting but I doubt that and they thought the speakers wud be difficult to sell.