In the very early domain trading days, ebay was one of the few places to sell domains but it became known for sellers outrageous pricing for even the poorest quality of domains. I don't think it ever recovered as a domain sales platform. There's no checks on who owns what, so members can list any domain they want to, on top of that you would have to arrange your own escrow or raise a dispute quite early in the sales process before your funds are Auto-released. I can't imagine any serious domain buyers searching for domains there