I've never owned one, but have looked at a few with a view to buying......I'm yet to see one without any rust.
The back end in particular seems very prone to the tin worm. In fact a fabricator friend of mine makes a decent living welding them up and replacing suspension mounts.
Non turbo diesels although slow will run for ever, and with all diffs locked they'll climb a wall.
Still fancy one, but finding a good one is proving difficult.