Thanks to their reputation for reliability and holding their prices well, Audis are a universally popular choice on the second-hand market, regardless of the model. That's why we’re happy to buy cars from across the entire Audi range: If you have an e-tron GT, A1, A2, A3, A4, A5, A6, A7, A8, Q2, Q3, Q4, Q5, Q6, Q7, Q8, TT or R8 to sell, pop your reg number in the box below to get a fantastic Audi valuation.