This saw looks complete. Exactly as found and not cleaned up. Sure looks like a low hour saw. The ring broke off a small portion and lodged in the cylinder. The piston may be usable with a cleanup and the cylinder needs a close inspection. If you enjoy a project where you don't have to search around for small missing parts, this will be good. How about $150? I searched around Ebay and the parts would sell for $500 if I could get their asking price, so the value is there. Specs and picture below.