"Im having a mechanic inspect the truck Monday, and will decide whether to make an offer based off of his assessment". Is there any way you can have your mechanic pull engine oil & trans fluid samples and overnight them to a test lab? Maybe leave a deposit with Mr Sketchy McSketcherson used car deal "pending lab test results"? My only regret when I bought my 2011 was that I was 400mi from home, and since it was the holidays there was no practical way to pull oil samples, wait for test results, then drive ANOTHER 800 miles round-trip. I got lucky on the engine and diff test results, but the trans had really high metals in it. I ended up buying an extended warranty, but having that trans fluid test would have either knocked $$$ off the price or made me keep on looking for another Raptor.