To estimate the price of the 2011 Audi A7 Quattro V6 3.0L Turbo 35 TFSI (Base) with 209620 km mileage, I considered several data points. First, a similar 2013 Audi A7 3.0L V6 TC 4WD with 140820 km sold for AED 34000 on 2024-02-16. Given the 2-year difference and higher mileage, the 2011 model should be valued lower. An offer of AED 19000 was accepted for the exact same model and mileage on 2024-08-20, which is a strong indicator. Additionally, the car was listed for AED 22500 but not delisted, suggesting it didn't sell at that price. Considering these factors, the most reliable estimate is close to the accepted offer of AED 19000.