To estimate the price of the 2016 Mazda CX-9 V6 3.7L Grade 1 Premium (Mid+), I considered several data points. The closest match is a 2016 Mazda CX-9 V6 3.7L Grade 1 Premium (Mid+) with 128,500 km sold for 45,000 SAR on 2023-12-11. Another similar car, a 2016 Mazda CX-9 V6 3.7L Grade 1 Premium (Mid+) with 153,000 km, sold for 60,000 SAR on 2024-02-08. Given the higher mileage of 278,500 km for the target car, I adjusted the price downwards. Additionally, a 2016 Mazda CX-9 V6 3.7L with 247,500 km in average condition sold for 39,000 SAR on 2023-11-09. Considering the target car's good condition but higher mileage, I estimated a price slightly lower than the 45,000 SAR benchmark but higher than the 39,000 SAR sale. The listed prices of similar cars (41,000 SAR and 46,000 SAR) also guided the final estimate.