To estimate the price of the 2021 Mazda CX-9 I4 2.5L High+ (Mid) with 87036 km mileage, I considered the following data points: 1. A similar 2021 Mazda CX-9 I4 2.5L Turbocharged High+ (Mid) with 119500 km sold for 109000 SAR on 2023-11-08. 2. A 2021 Mazda CX-9 I4 2.5L High+ Premium (Top) with 48000 km sold for 132800 SAR on 2023-05-30. 3. A 2023 Mazda CX-9 I4 2.5L High+ (Mid) with 15000 km sold for 128000 SAR on 2024-02-16. 4. A 2020 Mazda CX-9 I4 2.5L High+ Premium (Top) with 93000 km sold for 110000 SAR on 2024-04-23. Considering the mileage and condition of the target car, I adjusted the price downwards from the higher mileage and older models, and upwards from the lower mileage and newer models. The closest match in terms of variant and condition is the first data point, but with lower mileage, I adjusted the price slightly higher.