To estimate the price of the 2020 FAW-Bestune X40 I4 1.6L Top with 31000 km mileage, I considered several data points. First, I looked at the selling prices of similar cars: a 2020 model with 68000 km sold for 30300 SAR and a 2021 model with 40000 km sold for 31500 SAR. Both were Standard variants and in average condition. Given that the car in question is a Top variant and in good condition, it should be valued higher. Next, I reviewed listed prices: a 2020 Top variant with 31000 km was listed for 28000 SAR, and a 2021 Top variant with 28000 km was listed for 32500 SAR. Considering the car's lower mileage and better condition, I adjusted the price upwards from the lower end of the listed prices. Finally, I factored in the depreciation and the difference in trim levels to arrive at a fair market estimate.