To estimate the price of the 2023 BMW X6 M I6 3.0L Twin Power Turbo, I first considered the new car price of SAR 685000. Given the car is one year old, I applied a 10% depreciation, resulting in an estimated value of SAR 616500. Next, I reviewed the listed prices of similar cars. The closest match was a 2023 BMW X6 M I6 3.0L Twin Power Turbo with the same mileage listed for SAR 380000. Other listings included higher trims (V8 4.4L) with prices ranging from SAR 350000 to SAR 420000. Considering the lower engine size and the specific trim, I adjusted the estimate to reflect the market trend and depreciation, leading to a final estimate.