Can you find another one , a comparable truck , for less money?
That is the question.
If owning a truck of that vintage is your goal , that one is sitting right in front of you. Buy it. Offer him cash , ala Danny Koker , maybe he'll come down a bit.
If you are in it for the hunt , keep looking. The current owner of that 3100 will have little trouble finding a buyer. It is a hot item.