To estimate the price of the 2019 BMW X5 Mkit Twin Turbo V8 4.4L xDrive 50i (Top) with 135000 km mileage in average condition, I considered several data points. First, I looked at the selling prices of similar cars: a 2018 BMW X5 35i 3.0L I6 Twin Turbo M kit with 149000 km sold for AED 87000, and a 2019 BMW X5 xDrive 50i 4.4L V8 with 63000 km sold for AED 210000. Given the significant mileage difference, the latter is more relevant but needs adjustment for higher mileage and average condition. I also considered an accepted offer for a 2019 BMW X5 4.4L V8 AWD TC with 102110 km at AED 179000. For listed prices, a 2019 BMW X5 xDrive 50i with 120000 km was listed for AED 183500, and another with 165900 km for AED 170000. Considering depreciation and the average condition, I adjusted these values downward. The most relevant selling price is AED 210000, but adjusting for higher mileage and average condition, I estimate the market price accordingly.