I just looked at an 86 f-350 dually,reg.cab 6.9 auto.Tires-fair/engine sounded great,trans worked good.Truck looked decent but has rust in cab corners,in the floor at the edge of the corners.Right bedside has a couple of holes on the outside above the fender.I know it's hard to say because it's hard to accurately describe but what would be a ball park figure for this truck?

 

New Car Prices and Used Car Blue Book Values - Official Kelley Blue Book Site and then check poor condition and go from there.

 

Where are you located ? What is the mileage on the truck? 2 or 4wd, etc...

 

2WD in Ohio.

 

Here in Colorado, it seems there is often a rust free idi for sale on craigslist for $3-4000 for a 4X4 with less than 200K miles.