To estimate the price of the 2021 Audi A6 I4 2.0L 55 TFSI (Top+), I considered the following data points: 1. The selling price of a 2020 Audi A6 45 TFSI Quattro I4 2.0L Turbocharged with 79800 km mileage was SAR 125000 on 2023-11-18. This car is a year older and has higher mileage, so the 2021 model should be priced higher. 2. The listed price of a 2021 Audi A6 I4 2.0L 55 TFSI (Top+) with 48000 km mileage is SAR 170000. This is the same model and mileage as the car in question, but listed prices are generally higher than selling prices. 3. Other listed prices for similar 2021 Audi A6 models range from SAR 163000 to SAR 202000, with varying mileages and trims. Considering the specific trim and mileage of the car in question, the price should be adjusted accordingly. 4. The 2020 Audi A6 45 TFSI Quattro I4 2.0L Turbocharged with 79800 km was listed for SAR 125000 and sold for the same price, indicating a realistic market value. Based on these data points, I adjusted the price to reflect the newer model year, lower mileage, and specific trim of the car in question.