My 2010 A6 is better built and has no rattles at 60,000 miles. Sure, the driving dynamics leave a lot to be desired, but what do you need from a 2.0 diesel?Lol, says the A6 owner. The E60, whilst not without its flaws, can quite happily handle high mileage without being a "money pit".
My dad's 2006 525d (which he had from new) had bits falling off and rattles after only 3 years and 20,000 miles. At the time I thought that car was amazing, but it really wasn't. It wasn't a patch on the E39 and F10 in their prime.
I'm just saying that an early one could be a potential money pit, especially in the £5k price range. I'm not saying an Audi C6 A6 at that price point won't be either!