Newbie - good deal? What to ask?

[ih8vols]

Hello. First post here. Didn't grow up working on cars but have always wanted to get one to tinker on. I'd just like a good truck to drive around a couple days a week. I found a 1972 C1500 for sale. Interior has been restored and looks really good. Engine is original 350 with 131k miles. Body looks to be in pretty good shape (suppose to go see it in person later today). Does need paint, bumpers. They are asking $4k. How do I know if this is fair price? What should I look for or ask?

Appreciate the help!