Whats It Worth?

[MotownMadman]

I have a cousin who has contacted me for the first time in years because he was aware of the type of business I am in. He wants to know if I would have an interest in buying his car to keep it in the family. In 1964 he entered and won a contest from a radio station in Detroit, I believe it was CKLW AM, he was the lucky winner of a new 1964 GTO post car, 389 Tri-Power, 4 speed, posi, red with if I remember correctly a black interior. He has always been a street rodder and I cant remember him ever driving anything that wasnt at least 30 years old. The new Goat was of no interest to him, he put it in one of his buildings on blocks, started it a few times a year, drove it a short distance once in a while, never plated it, and as of today has 900 miles on it. The car is like new. All original paperwork including the contest documents. He asked me to make him a fair offer on the car, explaining since I was family he didnt expect top dollar. I told him I would get back in a few days. Ok guys, what would be a fair offer? He is family so I dont want to insult him, yet at the same time I would like the best deal I can get. I am looking for input as to actual market value and what you would consider fair if you were in my position. Ideas guys?
Thanks,
Motown [img]/ubbthreads/images/graemlins/dunno.gif[/img]