There is no data provided for selling prices, offers accepted, cars sold by dealers, or listed prices of similar cars. Additionally, there is no information on the price of new GCC-spec cars. Given the lack of specific data, I will use a general depreciation logic. Assuming a new BMW 528 I6 3.0 Turbocharged Standard sedan in 2011 was approximately 200,000 AED, and applying a 10% depreciation per year over 13 years, the estimated value would be around 200,000 * (0.9^13) = 52,000 AED. Considering the high mileage and average condition, I will further reduce the estimate by 20%, resulting in an estimated price of 41,600 AED.