Be nice if you do. This was the Ebay description:
You are bidding on a complete Minarelli M50-4 Moped 50cc Engine. Came from a closed moped shop. Engine turns over. Compression seems good. Cylinder wall looks clean. Carburetor is a Dellorto SHA 14/12. Comes with coil and lever. Comes with cables. Sprocket looks to be in good shape. I was not able to run the engine so I am selling it as is. Will be 30 pounds shipped. Fits mopeds such as AMF, American Triped, Baretta, Cimatti, Concord, Easy Rider, Fantic, Gadabout, Lazer, General, Intramotor, Motomarina, Raven, Motron, Pepi, Safari, Snark, Bianchi, Testi - check with your dealer to be sure it fits your bike.
I suppose it would be picky to say "complete" should include that nut... and the flywheel fan... even maybe a notation that a couple screws were broken off.