1957 Chevrolet Stake Truck 1 1/2 ton

Hello to all,
I have a 1 1/2 ton 57' Cheverolet Staketruck, other than the fact
that it has been sitting for about 20 years it is in good shape. No
damage, just exposed to the elements for quite a while. I live in a
dry climate so the rust is minimal. There has only been 1 owner.
Drivetrain is, to my knowledge, in fine working order. Although I
suspect many of the gaskets are probably pretty brittle now.
Mileage??? No clue as the odometer has turned over who knows how many
times, it was a work truck. I am willing to put _some_ work into this
vehicle if it will help, but have no desire to dive into it too deep.
That is unless there is no choice due to the price one would pay for
it restored. What could I expect to see this truck go for as is?
Restored? Auction or private party? I know this is extremely hard
for someone to do having not seen this truck, but I'm just trying to
get some ballpark figures and some direction, where do I go to sell
one of these things??? Many thanks to any who can help me out.

Milo