This guy is selling flood games and just passing them off as being dirty. Flood games bring a new problem in restoring, a lot of nasty stuff gets in the flood water and then into these games. You can get sick from them if you are not careful. The reason I know is I was in the restoration business for 23 years before catching the pinball fever
ebay.com link: WILLIAMS BIG GUNS PINBALL MACHINE PROJECT MEDIEVAL THEME GAME