You have to put a mark on the item somewhere, which can be hard with some things. In my early days I would from time to time list an electronic item and folks would pull the switcheroo, I finally realized if I included the seriel number in the photos it would stop and it did. Another time I sold a lalique wine glass- the buyer had an identical BROKEN one, it came back without my mark, low and behold he had done it many times, so i dont sell anymore. All sellers ARE willing to take these hits from time to time but it is the SAME BUYERS OVER AND OVER- we reported them for years and every one went on ripping off sellers, so there is NO POLICING by ebay- they do not do anything until a buyer steals 100's of items and that is too much for sellers to handle- WE NEED POLICING OF BUYERS, especially because it is so easy for them to get new id's! We told ebay for 10 YEARS to add buyers new ids to our BBL who were already on it but ebay has done nothing but given LIP SERVICE to Wall Street and that is why we all have left. Ebay continually leaves our flies open to be kicked and they keep saying take it for the team, but they are not our team anymore.
