Jim look for the usual stuff when looking at any car. Check the clutch, tire wear, u-joints all the way around, parking brake, PS leak, rear main leak, coolant leaks, make sure the check engine light comes on when the key is turned then goes out once the engine is going, 4wd works without funky noises.
A 90s truck in New England might have rust starting above the wheels, might not. A 5.0L manual Bronco might be difficult to locate. My father has a 94 Bronco w/auto and a little Myers snow plow. He's babied the s4it out of that, now he wants a GMC. I don't understand old people