The very FIRST THING that needs to be changed is for sellers to have the right to leave negative feeback for sellers who dont pay. Also there MUST BE some kind of doable, PROPER penalty imposed BY EBAY for those who do not pay, simply having a strike against a person, then blocking them from your own store obviously does NOT WORK. Honestly you would think the Ebay system would be fed up with being bunged up all the time by the endless, endless non payment disputes...........................

Ebay first needs to weed out these CONSTANT non payers, by giving sellers some of their rights back. That is where I would start if I were CEO.