How about one that has been totaled, but just rolled or something where the frame and drivetrain are good.
Strip the crushed stuff off and put your old body on it. No warranty, and would probably use the title from the old truck.
Should be a few thousand $ for a really low mile one, not free, but better than 20,000 to $40,000 or so.

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
---All pictures---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-