To estimate the price of the 2019 Mazda CX-9 I4 2.5L Turbocharged High+ Premium (Top) with 156000 km mileage, I considered the following data points: 1. A 2018 Mazda CX-9 I4 2.5L Turbocharged High+ Premium (Top) with 137000 km sold for 85000 SAR on 2024-05-31. 2. A 2018 Mazda CX-9 I4 2.5L Turbocharged High+ Premium (Top) with 70000 km sold for 97000 SAR on 2024-05-14. 3. A 2020 Mazda CX-9 I4 2.5L Turbocharged High+ Premium (Top) with 146000 km sold for 89000 SAR on 2024-04-30. 4. A 2020 Mazda CX-9 I4 2.5L Turbocharged High+ Premium (Top) with 93000 km sold for 110000 SAR on 2024-04-23. 5. A 2019 Mazda CX-9 I4 2.5L Turbocharged High+ Premium (Top) with 71000 km sold for 72300 SAR on 2023-12-17. Considering the car's higher mileage and the selling prices of similar cars, I adjusted the estimate accordingly.