Buying a Pao

I have just been unexpectedly been offered a Nissan Pao at a very reasonable price. It has done over 120,000 miles has twin webber carbs
and seems in generally good condition. Please can you advise me of any major pittfalls I might experience and what to look for before I part with my money?
Many thanks
My Pao has a rust spot on the metal beneath the door. It's only visible when you open the door. It rusted from the inside out. the paint is in good condition. I think this and other rust issues are common on these cars.