Well, this is a truck that if both tanks are full it will double the value.
Bodin, avg book (I assume with no pwr windows it is an XL) is $1600.00, clean is $2500, which is likely no more than a dealer will pay for it.
Vehicles of this vintage are very hard to finance, and on a lot this unit would ceiling around $5000. If you are in "truck country", farming community, oil patch, forestry, you might expect prices to be slightly firmer.