owilly: $5k for the truck you mentioned sounds about right, especially if it's number matching and very little rust. I just purchased 72 3/4 ton 4x4 with manual tranny, tach, tilt, AC. Body was from 2 wheel drive and frame running gear from 4x4 truck (put em together...so I'm driving what they call a mutt). Paid $3,500 for it (haven't even picked it up yet...
Be patient and keep your ear to the ground. I found mine by putting the word out around town (Maryville, MO) and found three locally.
This board is GREAT. People are very friendly and helpful. I've learned a lot in the two weeks I've been nosing around. There is a 1/2 ton 4x4 in North Dakota I was looking at. It needs rockers and cab corners, but body is pretty straight aside from that. PM me and I'll see if I can get you more info.
take care, and welcome