The most relevant data point is the 2018 model with a selling price of 155,000 SAR, which had a mileage of 80,000 km. The car in question has a lower mileage of 56,000 km, which would typically increase its value. However, since the car is older now, we must consider depreciation. The 2018 model sold in 2023, so we adjust for one year of depreciation, reducing the price by 10% to estimate the current value. This results in a price of approximately 139,500 SAR. The lower mileage could increase the value, so we adjust upwards slightly to account for this. The final estimated price is adjusted to reflect the market conditions and mileage, resulting in an estimated value of 150,000 SAR.