High mileage sometimes is not detrimental if they're "freeway miles" (I guess "motorway miles" in the UK). That is, the miles were accumulated by straight driving, not stop-and-go city traffic.
<8-12K miles for each year of its life.>
Wow. I remember leasing a car in 1993 and it had a 15K miles per year limit, which was extremely difficult to maintain. A co-worker of mine had a lake cottage up north that he visited almost every week-end, and put 52K on his car in six months! I guess lack of public transit in these parts is part of the reason that we drive more than our European counterparts....