Good points, MilesTeg.
I work with sales people who are constantly on the road. They're typically putting 30k to 50k miles a year on their cars and of course, a great amount of these are starting the car and driving for 2 hours at a shot. These are the absolute easiest miles on a car. If you can find one of these, 2 or 3 years old with 100k miles on it, you'll have a great car.
On the other end of the spectrum, my mother in law was a visiting nurse in a city environment. She'd get in the car and drive half a mile. Then an hour later, get in the car and drive half a mile. When I first met my wife, she was driving a Dodge Dart with the indestructible slant 6. Well, at 80k miles, the car spun a bearing and became junk. I don't think anyone, ever has heard of one of these engines dieing, let alone at 80k miles. You don't want one of these cars!