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 2023 BMW 218 Standard coupe has a price of 200,000 SAR, and considering a depreciation rate of 10% per year, the car would depreciate by 20,000 SAR per year. Since the car is one year old, the estimated depreciation would be 20,000 SAR. Therefore, the estimated price would be 200,000 SAR - 20,000 SAR = 180,000 SAR.