Looking for a Duramax and ran across an 05 fully loaded 4 door Silverado with 211k on the odometer, the interior looks immaculate and the drivers seat wasnt even torn in the normal spot or anywhere for that matter. They had it price at 13k, just curious if that seemed like a good price? I might go look at it and just wondering what are some warning signs i should look for when looking it over and driving it?