What do you guys think is a good price for one. It has the toolbox bed, its a one ton that has been well maintained. It has a floating rear axle, granny gears, and ugly paint, but runs strong. It was a fleet truck for my uncle's tree service company, and now he wants to get rid of it.
Anyone have any idea of its value?

Its gonna depend on where you are selling it. Some people really want these trucks and will pay top $$$ for it. The there are some that will offer little $$$. I know someone that paid around $500 for one (former US Forestry truck) But its a little on the rough side.

Right here in Los Angeles.