To estimate the price of the 2020 Changan CS75 I4 1.8L Turbocharged Plus Smart (Mid) with 138000 km mileage, I considered the following data points: 1. A 2020 Changan CS75 I4 1.8L Turbocharged Plus Limited (Top) with 131000 km sold for 46000 SAR on 2024-07-28. 2. A 2020 Changan CS75 I4 1.8L Turbocharged Plus Limited (Top) with 109000 km sold for 41000 SAR on 2023-09-23. 3. A 2020 Changan CS75 I4 1.8L Turbocharged Plus Smart (Mid) with 86000 km sold for 39000 SAR on 2023-11-21. 4. A 2020 Changan CS75 I4 1.8L Turbocharged Plus Trend (Base) with 141000 km sold for 27000 SAR on 2023-09-15. 5. A 2020 Changan CS75 I4 1.8L Turbocharged Plus Trend (Base) with 84000 km sold for 39000 SAR on 2024-08-03. 6. A similar car listed for 42000 SAR but not delisted. Considering the car's condition (average) and higher mileage, I adjusted the price downwards from the higher end of the range of similar cars sold recently.