How much rust is too much?

Any rust is too much...
If you live in a dry state or have big bucks. The rest of us have to learn to deal with it. There is not an infinite supply of cars that are 30 plus years old. Here in PA, in my local area, I seldom see anything on the road older than the late 80's. Wish I would have saved some of the A-bodies I parted back in the early 90's that were about the same shape as this one.