All this seems moot, since I noticed in the Q&A's going on around the time ebay announced it was tightening up payment methods (disallowing checks and MO's in favor of electronic, aka paypal payments), someone did ask about third-party setups and ebay's answer was that it was going to phase them out in favor of a setup of its own creation. The info was buried in a ton of other questions/answers regarding the more immediate changes being implemented, but still are significant for Auctiva users and others.