I started by looking at the selling prices of similar cars. The 2018 BMW 730 Li with 92000 km sold for 138000 SAR, the 2017 model with 80000 km sold for 130000 SAR, the 2016 model with 146000 km sold for 113000 SAR, and the 2020 model with 40000 km sold for 123500 SAR. Given the target car's mileage of 131000 km, it is closer to the 2016 model but newer, so it should be priced higher than 113000 SAR. The 2018 model with 92000 km sold for 138000 SAR, but the target car has higher mileage, so it should be priced lower. I also considered the listed prices: 156500 SAR, 132000 SAR, 130500 SAR, 148000 SAR, and 144500 SAR. These are generally higher than selling prices. Considering all data points, I estimated the market price accordingly.