1972 Porsche 911S. I have an opportunity to purchase. What should I be aware/leery of? Thanks

oil leaks,knocks in engine how clean it is under hood,milage,interior,basic stuff check how tires are wearing any smoke when crankedand how dry the exhoust tips are if wet and black watch out and check oil and other fulids,price of corse.

I would also check the body for rust. especially around the lower doors and underneath.