To estimate the price of the 2020 Mercedes GLS450, I first looked at the listed prices of similar cars. The 2021 GLS450 with 50,000 km is listed for SAR 310,500, the 2022 GLS450 with 46,000 km is listed for SAR 345,500, and another 2022 GLS450 with 38,055 km is listed for SAR 415,000. These are all American specs, similar to the car in question. The 2020 model is older and has higher mileage at 79,000 km. Considering the depreciation from 2021 to 2020, and the higher mileage, the price should be lower than the 2021 model listed at SAR 310,500. I estimate a depreciation of around 10% per year and additional depreciation for the higher mileage and average condition. This leads to an estimated market price for the 2020 model.