I recently sold my 00 4.2 to get a well needed truck, now looking at the A6's again because it was the best car I ever owned and found a bunch of 3.0 A6s 2001-2003 with under 40K were selling for about $12-13,000....this seems really low for a car with under 40K on it, but I know nothing about the 3.0s...Are they any good? Thanks