new guy considering buying a 65 valiant

Hey Everyone, I'm new to the board here. I signed up because I'm thinking of buying a 65 Valiant and am hoping to educate myself prior to making the deal.
If there is any specific threads here on buying tips, please let me know?

The car is a basic 2 door post with a slant 6 auto. I know it needs floors and frame work but the body, trim and interior all look ok. I've located floor & frame goodies at Auto Body Specialty, but haven't been able to find anyone who sells body panels for this car. I sense that there aren't a lot of parts out there for these, so I'd like to be very careful in this buy. Any suggestions regarding key problem areas and crossover models/years would be really appreciated

Thanks in advance,
Scott