There are a lot of used Audis R8 for sale. In order to find the perfect combination between price and quality there are 5 basic things that you should look at. The supreme Audi sports car- R8 has different specifications. The ultimate version is R8 spyder v10 Quattro. With its 5.2 petrol engine it is accelerating extremely fast. The least popular version of the series is the GT one. So logically if you are looking for a cheap Audi...