To estimate the price of the 2021 Alfa Romeo Stelvio Quadrifoglio, I started with the new car price of the same model in 2025, which is SAR 495,000. Given that cars depreciate by approximately 10% per year, I calculated the depreciation for three years (2025 to 2021). The depreciation factor for three years is 1 - (0.1 * 3) = 0.7. Therefore, the estimated price after depreciation is 495,000 * 0.7 = 346,500 SAR. Considering the car's average condition and mileage of 41,000 km, I applied a further reduction of around 10% to account for these factors, resulting in an estimated price of approximately 311,850 SAR.