I called it even with the seller last night. I didn't care enough about the item to persue it any further. I am fortunate enough to have a very complete classic Amiga collection, and my life will go on without this piece.
Had I really wanted or needed that part I might have fealt differently about it. I did not complain to anyone, especially ebay. I considered leaving a neutral feedback, but haven't even done that yet. If anyone, including ebay, is threatning the seller it is not my doing.
Jeff