To estimate the price of the 2019 Audi A6 55 TFSI Quattro V6 3.0L Turbocharged, I first considered the selling price of a similar 2020 Audi A6 45 TFSI Quattro with a 2.0L engine, which sold for SAR 125,000 in November 2023. This car is a year newer and has a smaller engine, which typically means a lower price compared to the 3.0L V6. Next, I looked at the listed price of a 2019 Audi A6 55 TFSI Quattro S-Line with a similar engine and mileage, which was SAR 158,500. This car was delisted recently, indicating it might not have sold at that price. Considering the depreciation and the fact that the target car is in average condition, I adjusted the price downwards from the listed price. The 2020 models with smaller engines and similar mileage are listed between SAR 110,000 and SAR 140,000, which further supports a lower estimate for the 2019 model with a larger engine. Taking all these factors into account, I estimated the market price for the target car.