To estimate the price of the 2016 Audi A6 35 TFSI 1.8L, I first considered the selling prices of similar cars. The most relevant data point is a 2016 Audi A6 35 TFSI 1.8L with 255,000 km sold for 45,000 SAR in November 2023. Given the high mileage, this price is lower than expected for a car with lower mileage. Another relevant car is a 2016 Audi A6 35 TFSI 1.8L listed for 60,500 SAR with 75,231 km, delisted in July 2024, indicating a potential market price around that time. The car in question has 77,116 km, which is closer to the listed car's mileage. Considering the depreciation and the fact that listed prices are often higher than selling prices, I estimate the market price to be slightly lower than the listed price. The selling price of a similar variant with 166,000 km was 55,000 SAR in July 2023, which also supports a price around 55,000 SAR for a car with lower mileage. Therefore, I estimate the market price to be around 55,000 SAR.