I guess I should clear up one thing, I'm trying to acquire the truck. I agree that there has to be an appraisal process as I have no clue how to put a value on such a vehicle. Currently, there are pieces of information that need to be checked and confirmed.
So far, I've gotten a way to decipher a VIN of a '59 Chevy and GMC truck but still looking for a way to verify number-matching. Also, I have very little idea how a stock '59 Apache 3100 looked like, in detail, when new; things like placement of the tail lights (e.g. is it the correct height ? About the same height as lights on the fleetside box ?), color scheme (e.g. was the "CHEVROLET" script on the tailgate body-colored or painted white like the pictures depicts ?), and a bunch of others. It will take only time, right ?