To estimate the price of the 2021 Nissan X-Trail I4 2.5L SV (Mid) with 56500 km mileage, I considered several data points. First, a similar 2021 X-Trail S 2.5L i4 with 20800 km sold for AED 80000 on 2023-09-26. Given the higher mileage and lower trim of the target car, this price would be adjusted downwards. Next, offers accepted for similar SV (Mid) variants were AED 78000 (53000 km) and AED 85000 (17000 km) in late 2023 and early 2024. Dealer sales for S variants ranged from AED 72241.5 to AED 80741.5, with higher mileage cars selling for less. Listed prices for SV (Mid) variants were AED 76000 and AED 80000, but these are typically higher than actual selling prices. Considering the target car's average condition and mileage, I adjusted the estimate to reflect a realistic market value.