I thought I would post this to show there are some alternatives truck deals other than dealers. Enterprize truck rental has low mile used trucks for sale. They were as clean as any used truck I've every seen. They have a short warranty and extended service contracts and flexible financing options. Also the trucks we looked at had brand new tires and had average equipment. The truck was a 2014 crew cab with 12000 miles 4x4 Duramax priced at $42000. This was in August 2014. I didn't buy because my wife wanted loaded out truck.
I am not endorsing Enterprize but if you are looking for a good used truck it may be worth a look.
"Freedom has a taste to those who fought and almost died for it ... that the protected will never know. Anonymous"
2016 Chevy High Country CC 2500 4x4 Duramax
30 DSRE White Hawk