To estimate the price of the 2021 BMW X2 sDrive 20i (Base++) with 73000 km mileage, I considered several data points. First, I looked at the selling prices of similar cars. A 2021 BMW X2 sDrive 20i (Base++) with 71000 km sold for 80000 SAR on 2024-08-13. Another 2021 BMW X2 sDrive 20i (Standard) with 58000 km sold for 95000 SAR on 2024-02-24, and a similar model with 33000 km sold for 98000 SAR on 2024-03-03. Given the higher mileage and average condition of the target car, I adjusted the price downwards. Additionally, the listed prices for similar cars were 82500 SAR and 87500 SAR, which are generally higher than actual selling prices. Considering the average condition and higher mileage, I estimated the market price accordingly.