To estimate the price of the 2023 Changan UNI-K I4 2.0L Turbocharged Flagship (Top) with 54000 km mileage, I first looked at the selling prices of similar cars. The selling prices for the Standard variant ranged from 103000 SAR to 126500 SAR, with lower mileage. The highest selling price was 126500 SAR for a car with 8000 km, and the lowest was 103000 SAR for a car with 19000 km. Given the higher mileage of the target car, I adjusted the price downward. Next, I considered the listed prices of similar Flagship variants, which ranged from 79000 SAR to 120000 SAR. The car listed for 79000 SAR had 21749 km, and the one listed for 120000 SAR had 5000 km. Considering the higher mileage of the target car, I adjusted the price downward from the higher end of the listed prices. Finally, I factored in the condition and the fact that the target car is a top variant, which generally commands a higher price than the Standard variant.