What is he asking? A solid short box here in the rust belt is actually worth something. It will be worth more here than down south or out west.
Also, is there any other rust issues? Be sure to check the obvious (cab corners, rockers) and the stuff that may be a little more hidden (floor, lower cowl, cab mount area). Also, check all around the windshield for rust in the roof and header area.
How is the box? A shortbox that is not beat is worth something; but if it needs work, the parts are more expensive than longbox stuff (except maybe repop)
If its an original paint, rust free truck (except fenders) this could be a good find