To estimate the price of the 2018 BMW 530 I4 2.0L Twin Power Turbo (M Kit) Standard, I first looked at the selling prices of similar cars. The 2017 models with average condition and high mileage (197000 km and 210000 km) sold for SAR 73000 and SAR 81000 respectively. A 2017 model with good condition and lower mileage (115000 km) sold for SAR 96000. Given the 2018 model has lower mileage (85500 km) and is a year newer, it should be valued higher. Next, I considered the listed prices of similar 2018 models. The prices ranged from SAR 109000 to SAR 189000, but these are listed prices and typically higher than selling prices. The most relevant listed price is SAR 136000 for a car with 106000 km. Considering the depreciation and the average condition of the target car, I adjusted the price downwards. Combining these data points, I arrived at a reasonable market price estimate.