To estimate the price of the 2021 Mercedes GLE63 AMG V8 4.0L Twin Turbo Standard SUV with 67000 km mileage, I started with the new car price of the 2025 model, which is SAR 559500. Assuming a 10% depreciation per year, the 2021 model would have depreciated for 4 years, resulting in a depreciation of approximately 34.39% (1 - 0.9^4). This gives an estimated value of around SAR 366800. Additionally, a similar 2021 model with lower mileage (39000 km) is listed for SAR 427000. Considering the higher mileage of the target car, I adjusted the price downwards. Combining these data points, I arrived at the final estimate.