To estimate the price of the 2020 Audi A4 35 TFSI S-Line I4 2.0L Turbocharged 30 TFSI Sport (Top) with 57000 km mileage, I considered the listed prices of similar cars. The closest matches are: 1) A 2020 Audi A4 35 TFSI I4 2.0L Turbocharged with the same variant and mileage listed for SAR 135000, delisted on 2023-12-15. 2) Another 2020 Audi A4 35 TFSI S-Line I4 2.0L Turbocharged with similar mileage listed for SAR 129500, delisted on 2024-06-28. These two cars are the most relevant as they match the year, variant, and mileage closely. The average of these two prices is (135000 + 129500) / 2 = 132250 SAR. Considering the delisting dates and the fact that listed prices are generally higher than selling prices, I adjusted the estimate slightly lower to reflect a more realistic market value.