Given the lack of specific data points such as selling prices, offers accepted, and listed prices of similar cars, I will use the new car price and apply depreciation logic. Assuming a new 2021 Mercedes E53 AMG V6 3.0L Twin Turbo 4MATIC (Top) coupe costs around 400,000 SAR, and considering a depreciation rate of 10% per year, the car would depreciate by 40,000 SAR per year. Since the car is 3 years old, the total depreciation would be 120,000 SAR. Therefore, the estimated price would be 400,000 SAR - 120,000 SAR = 280,000 SAR.