I own three. #1 was on a local pinball sales forum for 100$. #2 was on the upper level of a barn. They'd forgotten it was there. #3 was purchased from a friend liquidating his collection.
Our bingo was found by telling a lady running an antique store we collected pins, she gave me the number of a guy who'd been there two days earlier trying to get rid of one. They've really come from all over.