To estimate the price of the 2016 Audi A8 L 50 TFSI Quattro V6 3.0L Turbocharged (Top) with 178000 km mileage, I considered several data points. First, I looked at the selling prices of similar cars. A 2016 Audi A8 V6 3.0L with 171000 km sold for 59500 SAR on 2024-05-09. A 2014 Audi A8 V6 3.0L with 231500 km sold for 49500 SAR on 2023-11-19. A 2014 Audi A8 TFSI Quattro V8 4.0L with 116000 km sold for 72500 SAR on 2023-11-28. A 2015 Audi A8 V6 3.0L Super Charged with 81000 km sold for 89000 SAR on 2024-05-14. A 2018 Audi A8 V6 3.0L Twin Power Turbo with 104000 km sold for 160000 SAR on 2024-06-25. A 2016 Audi A8 TFSI V8 4.0L Twin Turbo with 35000 km sold for 71400 SAR on 2024-08-15. Next, I considered the listed prices of similar cars. A 2016 Audi A8 L 50 TFSI Quattro V6 3.0L Turbocharged with 178000 km is listed for 77000 SAR. Another 2016 Audi A8 V6 3.0L with 177000 km is listed for 70000 SAR. A 2016 Audi A8 V6 3.0L Twin Turbo with 183000 km is listed for 78000 SAR. Another 2016 Audi A8 L 50 TFSI Quattro V6 3.0L Turbocharged with 193000 km is listed for 74500 SAR. Finally, a 2016 Audi A8 V6 3.0L Twin Turbo with 129000 km is listed for 91000 SAR. Considering the selling prices and the listed prices, I estimated the market price of the car.