Proprietary
proprietary - The dictionary meaning for proprietary is something that is secret or privileged. When this term is used by the eBay staff it means "we have no idea what we are doing and you want us to tell you?" When the eBay staff are asked to justify a statement or decision that is contradictory to eBay rules, practices, or common logic, they declare that information to be proprietary. eBay staffers use it to evade the truth: there is no logical or legal basis for their answer because the answer they gave was pulled out of their collective ass.