Looking for 1st gen K5 on east coast

[70VaHokie]

I had an opportunity last week to buy a 72 K5 in the NE area for $10k from the original owner but got spooked thinking about all the salt the truck has seen over 45 years even though it doesn’t show many signs of rust on the surface. The owner explained that he rinsed it off top to bottom after every road trip in the winter, and then reapplied “texicote” undercoating cut with fuel oil every year. He was convinced that it is a truely rust free vehicle because of all the care he took. I don’t mind the mechanical restoration work, but am not interested in curing rust cancer. Is it possible that a truck living in the NE for 45 years with 185,000 miles on it could be rust free and not be hiding some deep lurking major rust issues? Should I reconsider this truck since it truely stock and well cared for, or just start looking West?