The car to be estimated is a 2023 Kia Pegas with a 3.8L engine, which seems to be a typo or error since the Pegas typically comes with a 1.4L engine. Assuming it's a 1.4L, we have a selling price of a similar 2023 Kia Pegas 1.4L i4 at AED 43,000 with only 500 km mileage. The car in question has 300,000 km, which is significantly higher, indicating a substantial depreciation. New 2025 models start at AED 45,000 for the LX variant. Considering the high mileage, the car's value would be much lower than the selling price of the low-mileage 2023 model. Listed prices for 2021 and 2022 models with lower mileage range from AED 34,500 to AED 49,990. Given the high mileage and assuming a standard depreciation, the estimated market price for the car in question would be significantly lower than the selling price of the low-mileage 2023 model, likely around AED 20,000.