One persons 65k mile car can be a neglected wreck, run low on oil, poorly if ever serviced, thrashed with no mechanical sympathy through pot holes and over thousands of speed humps and kerb strick daily, never washed.

Another persons 80k identical model could be well cared for, serviced above and beyond levels always topped up, driven competently but swiftly with mechnical sympathy, washed and polished regularly and washed underneath every spring after the salt has gone.

The two seemingly identical cars will be chalk and cheese, however they might look the same from 3 yards away after the valeters have done their bit, but they will feel completely different and once you get up close and start checking wheels/brakes and underneath and the state of the inside then test drive the differences will show.

Colour. Spec. Service history. Even down to the remaining tyre tread depth, and whether or not 'good' performance tyres are fitted, or cheap chinese ditchfinders.