Go to look at them and observe the place it is kept and condition of their other equipment. Will tell you a lot about how they cared for the 'wing. I traveled 80 miles to look at a '78. While waiting for the owner to show, I noticed an old Ford Rnger with its bed full of trash, an above-ground pool behind a delapidated privacy fence - also full of trash. The double-wide didn't look well kept either. The guy was late, and I decided not to wait or come back. But then, I bought the Hunley from a well-kept aircraft hanger. Upon diving in, I found plenty of lashed-up "PO" issues. I did buy a John Deere 345 from a very nice home with other immaculate equipment that has been a real jem.