To estimate the price of the 2020 Changan CS75 I4 1.8L Turbo Charged Plus Smart (Mid) with 143000 km mileage and average condition, I considered several data points. The closest match is a 2020 Changan CS75 I4 1.8L Turbo Charged Plus Smart (Mid) with 86000 km, average condition, sold for 39000 SAR on 2023-11-21. Adjusting for higher mileage and the time difference, the value would be lower. Another relevant data point is a 2020 Changan CS75 I4 1.8L Turbocharged Plus Limited (Top) with 131000 km, average condition, sold for 46000 SAR on 2024-07-28. Given the higher trim and slightly lower mileage, the value for the target car would be lower. The listed price for a similar car is 45000 SAR, but listed prices are generally higher than selling prices. Considering these factors, the estimated market price is adjusted accordingly.