I end up trading every truck with fewer miles than that, anymore! Rust takes them, long before mileage or mechanical problems, given how heavily they salt the roads these days. I'd think it must be even worse in NY than in PA?
Rust rarely creates a serious safety issue on a full-frame truck, that's more of a unibody problem. But it leaves me with two other problems:
1. Stupid little stuff starts breaking, like parking brake cable brackets, etc.
2. The vehicle starts to look so ratty that I can't very well show up to a customer meeting in it, without them questioning who they're doing business with.