How do these cars do with high miles? I've been finding a number of one owner 100,000+ mile cars that are super clean and appear very well maintained; or I can find cars with 1/2-3/4 the miles for 1.5-2x the (asking) price. I'm not just talking drivetrain, but the car overall. Was it just the engine that got hand-built treatment during production or were the entire cars recipients of "special handling"?