need some help with an old truck
 

my friend has a 1968 chevy cst 30. he cant find much info on it. there were only 900 built. and is worth upwards $50,000 fully restored. he doesnt have the money to restore it and wants to sell it but has no idea what its worth. the body is in ok condition., it doesnt have the original 396 or the original paint job. but the built sheet is still in it. ( idk if that matter or not) it has a car hauler bed on it right now. with a healy duty winch. the motor need some work and it has no brakes. he wants to sell it as is. can anyone help me?