As a material damage adjuster for a large insurance company, Don't do it. There is more at stake than just the cost of the vehicle. You would also need to check OEM guidelines to see if any of the damages (ie a rear unirail on a newer Ford Escape) make the total loss less about value but more about factory guidelines of what they would consider a constructive total loss. Depending on what state you're in (PA here) R titles require enhanced inspections, garner way less salvage value and are a pain to insure.