There must be some hidden incentives at play. The chinese sellers never get a sale, but keeps relisting for years at used prices that are 2-3x what is costs to buy new. Are there "bonuses" for having many listings? It is simply not logical to list something at twice the price to buy it new, and then - sloppily - show a generic warehouse picture with cardboard boxes.
Sadly, the listing prices affects other (nominally sane) sellers that then starts to ask for fantasy prices as well, not checking the "sold items" checkbox when getting a price indication.
eBay of today is a swamp. At a minimum, eBay should allow buyers to have permanent exclude lists.
A new "feature" is allowing sellers the option to send "offers" to those that have an item on their watchlist - many use this opportunity to offer a 3% discount, and do not allow for counteroffers. Pure harassment.