To estimate the price of the 2021 BMW X2 sDrive 20i (Base++) with 71000 km mileage, I considered several data points. Firstly, a similar car with the same variant and mileage sold for 80000 SAR on 2024-08-13. This is the most relevant data point. Other similar cars with different variants and lower mileage sold for prices ranging from 85500 SAR to 155000 SAR, but these are less relevant due to differences in mileage and variant. Additionally, the car is listed for 87500 SAR and 80000 SAR on classified sites, which are typically higher than actual selling prices. Considering the most relevant selling price and the listed prices, I estimate the market price to be slightly lower than the highest listed price but close to the recent selling price.