Because the buyer uses BS excuses, I sell on the terms of no returns, however if the item is received defective, you have to accept the return, but if the buyer changes their mind and decides they don't really want it, they use a BS excuse like it defective and ebay force you to accept the return, when you get it back, yes you can test it, then file a false claim, ebay will also advise of this, but then don't really want to know, they just give rubbish excuses like you may have multiple same items for sale, or we have no way to identify that is the item you sent to the buyer, its a loose loose situation for the seller, if you ever sell on ebay again, just remember, although they advertise it, there is no seller protection.