Bought a Toyota PU new in '79 and put 275k or so on it before a daughter ended it's run up against a redwood in '05. Picked up a used '04 Tacoma and put a leer shell on it. It's at about 135k now and I'm guessing it's got another 200k in it.
I average sleeping 15-20 nights a year in the shell on short trips and en route to Mt or wherever.
It makes a good emergency kitchen in the snow -)