To estimate the price of the 2016 Nissan X-Trail I4 2.5L S 4WD (Base+), I first considered the selling prices of similar cars. The most relevant data point is a 2016 Nissan X-Trail S 4WD (Base+) with 90000 km sold for 52000 AED on 2024-07-25. This car has lower mileage than the target car, so the price should be adjusted downwards. Another relevant data point is a 2016 Nissan X-Trail S 2WD (Base) with 133500 km sold for 35000 AED on 2024-09-21. The target car is 4WD, which typically commands a higher price than 2WD. An offer was accepted for a similar 4WD variant at 55000 AED on 2024-06-27, but this car had lower mileage. Considering these factors, the estimated price should be slightly lower than 52000 AED due to higher mileage but higher than 35000 AED due to the 4WD feature.