For Those Who Have Purchased a "Non-Running" Mopar/Other

Junkyard Empire on Motor Trend:
Andy bought a newer model supercharged Audi from a dealer who advised the car needed a motor due to oil smoke out the tailpipe and oil everywhere on the motor.
I was invested emotionally at this point and was curious myself.

Compression good, pulled supercharger, cleaned oil, valves, new plugs. Culprit: bad PCV system which was replaced. Ran like new when all said and done. Dont know the purchase price though. I know dealers are not the be all, end all. Bad techs? Inexperienced tech?

Also, I knew a guy who got an older model lexus from a dealer who told the customer he needed a head gasket due to overheating. Customer bailed. Guy takes car home changes the thermostat and coolant, keeping close eye on it. Never had a problem since!