Definately check for corrosion. Check all fluid levels and condition (oil, trans, differential, brake, steering). Check the frame to see if it has been repaired or is bent. Check the brakes (pads, rotors, drums). Also check overal condition of the engine bay. Its not super high mileage, but its lifted so it might have been riden hard and put away wet (ie abused).
$5000 tops if everything is in good condition.