To estimate the price of the 2014 Audi A8 L TFSI Quattro V6 3.0L Turbocharged 60 TFSI (Top) with 139000 km mileage, I considered several data points. First, I looked at the selling prices of similar cars. A 2014 Audi A8 TFSI Quattro V8 4.0L with 116000 km sold for 72500 SAR on 2023-11-28. Another 2014 Audi A8 V6 3.0L with 231500 km sold for 49500 SAR on 2023-11-19. A 2013 Audi A8 V6 3.0L with 220000 km sold for 41099 SAR on 2023-08-13. A 2016 Audi A8 V6 3.0L with 171000 km sold for 59500 SAR on 2024-05-09. Finally, a 2015 Audi A8 V6 3.0L Super Charged with 81000 km sold for 89000 SAR on 2024-05-14. The listed prices of similar cars were also considered: a 2014 Audi A8 L TFSI Quattro V6 3.0L with 139000 km listed for 68000 SAR, a 2014 Audi A8 TFSI Quattro V8 4.0L with 116000 km listed for 76500 SAR, and a 2014 Audi A8 V6 3.0L with 167000 km listed for 56000 SAR. Given the average condition and mileage of the target car, I weighted the selling prices more heavily, especially those closest in variant and condition, and adjusted for mileage and market trends.