I used autotrader, carmax, autonation and local Audi dealership for my trade which was a 2012 Audi A7. Autotrader came in the lowest at less than $50k. Autonation was $51.5k, Carmax was $53k and Local Audi was $53.5k. Definitely worth shopping around for trade in deals. I ended up going with Autonation even though it was the second lowest because of the tax savings with a trade. The tax savings was a little over $3k so even though autonation was $2k below the best deal I still saved $1k going with Autonation.