CJ-7: Depending on rust, 0-2k. 2k would be minus an engine but with all your dream parts already installed.
I don't know about the 5. Need more info.
I will put it this way. I drove from middle of Louisiana to middle on New Mexico to get a rust free CJ-7 for 4k. When I sold it, a guy from Indiana drove to LA to get it. Hard to find a good CJ....
From what you said (it the CJ-5 runs and drives), I would offer 4k and walk if he said anything above. Of you could take my Dad's approach, as him what his bottom dollar is, but then you are stuck there.