To estimate the price of the 2015 Mazda CX-9 V6 3.7L High+ Premium (Top) with 268,000 km mileage and average condition, I first considered the selling prices of similar cars. A similar car with 283,000 km and average condition sold for 41,000 SAR in January 2024. Another with 310,000 km and good condition sold for 30,000 SAR in August 2023. The car with 243,000 km and good condition sold for 46,000 SAR in December 2023. The car with 248,000 km and good condition sold for 47,000 SAR in May 2024. The most relevant is the 283,000 km car at 41,000 SAR, as it matches the variant and condition closely. Considering the mileage and condition of the target car, I adjusted slightly below 41,000 SAR. Listed prices for similar cars range from 39,500 to 56,000 SAR, but these are typically higher than actual selling prices. Therefore, I estimate the market price to be slightly below the 41,000 SAR selling price of the most similar car.