I started by examining the selling prices of similar cars. The most relevant data points are the 2021 Nissan X-Trail S 2.5L i4 with a selling price of AED 80,000 (Mileage: 20,800 km, sold on 2023-09-26) and AED 79,000 (Mileage: 25,600 km, sold on 2023-06-25). Another car sold for AED 85,000 (Mileage: 40,000 km, sold on 2023-05-14), but this car had a warranty till 2026, which might have increased its value. The car sold by a dealer for AED 80,741.5 (Mileage: 46,644 km, sold on 2023-10-06) is also relevant. The car to be estimated has a mileage of 36,800 km and is in average condition, which is slightly worse than the 'good condition' of the sold cars. Considering the mileage and condition, the estimated price should be slightly lower than the AED 80,000 - 79,000 range. The listed prices of similar cars range from AED 65,000 to AED 86,990, but these are generally higher than actual selling prices. Taking into account the average condition and the slightly higher mileage compared to the lowest mileage sold car, I estimate the market price to be slightly below AED 80,000.