To estimate the price of the 2014 Opel Insignia I4 Turbo 2.0L OPC, I considered several data points. First, the accepted offer for a 2016 Opel Insignia OPC with a higher mileage of 271000 km was AED 13000. Given the target car's lower mileage of 138000 km, it should be valued higher. Next, I looked at classified listings for 2014 models with similar mileage, which ranged from AED 25000 to AED 35000, but these are generally higher than actual selling prices. The new car price for a 2025 model is AED 134000, and applying a 10% annual depreciation over 10 years results in a significant reduction. Considering the average condition and the OPC trim, I adjusted the price downwards from the classified listings but higher than the accepted offer for the 2016 model.