1957 Chevrolet 4X4

[jlasko57]

Not sure if this is the correct place to post this?
I found this 1957 Chevy and I have a chance to buy it. I was wondering what you guys think its worth? I know the guy who built it and it was built with Quality! He ran into some financial problems and sold it before he was done. the guy he sold it to still has it. The truck was built 16 or so years ago and has been sitting since 2002. It almost looks the same as it did the first time I saw it back in the late 90's. It is a stock frame with early 80's 1/2 ton 4x4 powertrain transplanted. It has a big block 402 (396 .030" over).
The guy told me to make him an offer and I don't want to insult him or over pay! let me know what you guys think and I will try and get more info!