To estimate the price of the 2016 Nissan X-Trail I4 2.5L SL AWD W/Safety Shield (Top+), I considered the following data points: 1. A similar 2016 model with the same variant and average condition sold for 45000 SAR on 2024-05-01 with 123000 km. 2. Another 2016 model with the same variant and average condition sold for 45000 SAR on 2024-03-19 with 155000 km. 3. A 2016 model with a different variant (S 2WD) and average condition sold for 34500 SAR on 2024-05-16 with 233000 km. 4. The listed price for a similar car with the same variant and mileage is 51000 SAR. Considering the higher mileage (227000 km) and good condition of the target car, I adjusted the price slightly lower than the average selling prices of similar variants in average condition.