Yahoo posted a list of 10 high quality used cars as seen in terms of reliability through the eyes of mechanics.

The full story is here, but if you want the short list, see below:

Saturn L200Buick Lucerne
Ford Crown Victoria
Buick Park Avenue
Buick Lucerne
Chevrolet Corvette
Chevrolet Prizm
Pontiac Vibe
Jeep Cherokee
BMW Z4
Infiniti M35