Given the lack of specific data points such as actual selling prices, offers accepted, or listed prices, I will use the depreciation logic based on the new car price. Assuming a new 2014 Porsche 911 4S 3.8L V6 Standard coupe had an approximate price of 400,000 AED when new, I will apply a 10% annual depreciation over 10 years. The depreciation calculation is as follows: 400,000 AED * (0.9^10) = 138,428 AED. Considering the car's good condition and mileage of 90,500 km, which is reasonable for a 10-year-old car, I will adjust the price slightly upwards to account for its maintained condition.