I wouldn't get too hung up on mileage, my gti is just over to turn over to 100,000 miles and it still feels tight as a drum!
Plus getting a car with slightly higher miles even if its only 50/60k then not only is it a hell of a lot cheaper but the previous owner has already spend his cash at the dealer with expensive services so you dont have to.
To give you an idea, when I brought mine it had 85k on the clock, black 3 door, 18's with every single optional extra ticked from the factory apart from sat nav, Had 2 previous owners and I got it for a shade over 6 Grand.