We purchased a 2008 GMC Sierra 3500 dually with Duramax in 2015. The truck is fully loaded, had 110000 miles and paid $29000. The truck has been solid as a rock and now has 153000 miles. Will be purchasing it's first set of new tires this spring. The only issues we've had is a bad glow plug, a failed o-ring on fuel filter housing and had to replace the anti lock brake regulator. Total repair costs around $300. Love this truck and will drive it another five years. The truck is still worth close to $25000 so it has been a great buy as well.