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.
Jeep LJ on 37s