To estimate the price of the 2020 BMW X5 M 50i V8 4.4L Twin Power Turbo, I started with the new car price of the 2025 BMW X5 M Standard SUV, which is SAR 669500. Assuming a 10% depreciation per year, the value of a 2020 model would be approximately SAR 669500 * (0.9^5) = SAR 435000. Next, I looked at the listed prices of similar cars: a 2020 BMW X5 M V6 3.0L Twin Power Turbo listed for SAR 245000 and a 2022 BMW X5 M xDrive 40i I6 3.0L Twin Power Turbo listed for SAR 296000. Considering the V8 engine and higher trim of the target car, I adjusted the price upwards from the V6 model. Factoring in the mileage and condition, I estimated the market price to be slightly higher than the V6 model but lower than the newer 2022 model.