A used car with 150,000 highway miles can sometimes make more sense than one with 80,000 city miles. That sounds backward until you consider what those miles actually involve.
Highway driving usually puts fewer demands on brakes, transmissions, steering components, and cooling systems than constant stop-and-go traffic. City driving can rack up wear faster because the car repeatedly accelerates, brakes, idles, turns, bumps over rough pavement, and starts again.