Hi, Fritz,
You'll want to get closeups of the chassis and motor numbers and the ID plate.
If you're really interested in the car you should probably get one of the experts in Europe to go look at it-- maybe Tony Berni, as he lives in Italy.
Ask the seller if the windshield is made of glass or plexiglass-- one for sale in Los Angeles a while ago had a plexiglass windsheild, which is probably not road legal in most states.
Jim Oddie