To estimate the price of the 2017 Mazda CX-9 I4 2.5L High+ (Mid) with 268000 km mileage in average condition, I considered several data points. The closest match is a 2017 Mazda CX-9 I4 2.5L Turbocharged, High+ Premium (Top) variant with 215822 km sold for 64500 SAR on 2024-07-31. Given the target car's higher mileage and lower trim, a downward adjustment is necessary. Another relevant data point is a 2017 Mazda CX-9 I4 2.5L High+ (Mid) with 143600 km sold for 64000 SAR on 2023-07-16. Considering the significant mileage difference, further depreciation is applied. Additionally, a 2018 Mazda CX-9 I4 2.5L High+ (Mid) with 110850 km sold for 84000 SAR on 2023-10-24, indicating a higher price for a newer model with lower mileage. Factoring in these comparisons and the listed price of a similar 2017 model at 48000 SAR, I adjusted for the higher mileage and average condition to arrive at the final estimate.