Price varies depending on region.
The major thing that sticks out to me is it's lifted, has oversize wheels/tires, and a plow mount...check that front suspension carefully. Check the hub assemblies and ball joints thoroughly, also check the idler and pitman arms and the tie-rod ends.
Check for pump rub (case rub through...look for fluid on the case) on the t-case. Being an LB7 check to see if the injectors were ever replaced. There is a vin check section on here to check warranty claims through GM.
Whats with the wrecked car sitting next to it? The entire right front upper control arm and strut assembly is hanging off of it.