To estimate the price of the 2021 BMW X4 I4 2.0L Twin Power Turbo Standard with 77000 km mileage, I first looked at the selling prices of similar cars. A 2022 BMW X4 with 19000 km sold for 125000 SAR in December 2023, and another 2022 model with 42000 km sold for 205000 SAR in April 2024. Given the significant mileage difference and the fact that the target car is a year older, the value should be lower. Next, I reviewed listed prices of similar cars. A 2021 BMW X4 with the same specs and mileage is listed for 203000 SAR, but this is likely higher than the actual selling price. Other 2021 models with different specs and mileages are listed between 185000 and 235000 SAR. Considering the depreciation and the average condition of the target car, I adjusted the price downwards from the listed prices. Finally, I factored in the average condition of the car, which would further reduce its value compared to those in good condition.