I started by examining the selling prices of similar cars. The most relevant data point is the 2017 Infiniti QX70 3.7L V6 Elite Sport (Top) with 121800 km sold for 68000 AED in July 2023. Another similar car with 61000 km sold for 79000 AED in June 2023. The car in question has 85800 km, which is closer to the first car. Considering the mileage and the time since those sales, the value would have slightly depreciated. The 2019 models sold for 67000-78000 AED, but they are newer. The listed prices for similar 2017 models range from 68000 to 89500 AED, but these are generally higher than actual selling prices. Considering all this, the estimated market price for the car in question is likely around 67000 AED.