I am looking at possibly purchasing a used 2007 Ford F-250 Crewcab Longbed Lariat 6.0 Diesel 4wd. It has a 3" lift with 35"s and other than that is stock. It has 39,000 miles (it went in service in Sept 06) and they are selling it for $26,000 at the dealer it is at. I have a oasis report and its...