68 Camaro value

[SS427]

I have an opportunity to purchase a 68 Camaro from a friend and need help in determining the value and give him a fair market price. The car is a 68 Camaro, 327 2 bbl, powerglide, 10 bolt, power disc brakes, A/C, trim package. It came from California from the original owner over 20 years ago and the body on this car is absolutely mint. No rust or hints of rust anywhere. Mint floor pans with factory carpet sound deadener still in place. Factory grey primer and body color overspray on the bottom is still very evident, fuel and brake lines have hardly any oxidation, clips are still color coded, all front suspension still shows inspection marks. Tape on subframe mounts still there. Subframe is excellent. Car was originally Butternut Yellow with black interior and is now black with red interior. Car is all apart on a rolling chassis with Rally wheels and was going to be restored before he lost interest. Was a running driving car just a few years ago. I just want to be fair with him on price. I'm a Chevelle guy so not up on Camaro prices. Any help is much appreciated.