This truck has some positive features, VERY rare Chief, black interior, southern (rust-free) body. But it has SIGNIFICANT negative mechanical issues that will require lots of time & money to make it road-worthy and more of a road-queen.
Bottom line, it is NOT worth $1,000 in current condition... I would offer $600 and not budge. Trust me, he will not have a ton of offers and will call back with a counter offer-make sure he has your cell and email so he can find you.