As the car has a factory hood insulator, it should also probably have factory undercoating on it, I believe. But that trunk floor section looks suspect if it does.
I'd also highly suspect the rh front floor section has some "issues" hiding under the carpet. Reason? That solid vinyl/rubber floor mat! That solid mat will trap moisture under it, from temperature variations AND the typically leaky a/c cases, from what I saw with my '70 Monaco.
Otherwise, the body issues seem to be what I might suspect as "normal" or better than normal for that locale and the age of the car. A visual inspection, as mentioned, would be necessary.
Personally, I like that dark green/vinyl roof combination. But that's just me. The darker metallic colors tended to show up the great lines of those cars.
The interior "wear and tear" items can be expensive to fix, too, as might the vinyl top to replace later. Much of it "par for the course", though.
Unless this car is just what you desire, there might be better ones later on, with fewer rust issues. Just from what is visibly, to fix them might cost what a better-condition car might cost by itself. But it does look pretty good as it is. Probably good enough to be a driver until repairs could be made? Still, an inspection is needed before making a final decision.
CBODY67