To estimate the price of the 2018 Kia Sportage I4 2.0L Turbocharged (Diesel) LX (Base) with 45000 km mileage and average condition, I first looked at the selling price of a similar car: a 2018 Kia Sportage I4 1.7L Turbocharged (Diesel) EX (Mid) with 121050 km sold for SAR 53000 in April 2024. Given the higher mileage and different variant, this car's price is a bit lower. Next, I considered the listed price of a similar car: a 2018 Kia Sportage I4 2.0L Turbocharged (Diesel) LX (Base) with 45000 km listed for SAR 67500. This is a closer match in terms of variant and mileage. Other listed prices for similar models with higher mileage and different variants range from SAR 45000 to SAR 71000. Considering the average condition and the fact that listed prices are generally higher than selling prices, I adjusted the estimate downwards from the listed price of SAR 67500.