For discussion sake, take price and value out.
What has been done to the car will not (likely) be un-done.
What has been done to the car could have been done to any number of donor cars (from 60's to current production).
I'm going to guess here, I have a gut feeling the guy has done this to smite others that might thought they had a chance to (finally) own the car.
Having a terminal diagnosis makes some people do incomprehensible things.