Achipmonk has a good point. I paid $1500 for my 53 3/4 ton. Not in as good a shape as the one in your pics.(not by a long shot)
I wanted it pretty bad. If not I could have got it for probably 1G or even less. These are very hard to come by where I live.
If you like the truck make an offer, keep it low. The worst that could happen is they tell you its too low.
The opposite wont happen if your offer is too high.
Rich