To estimate the price of the 2015 Nissan X-Trail V4 2.5L S 2WD (7-Seater) in average condition with 312,000 km mileage, I first considered the selling prices of similar cars. A 2015 model with the same variant and similar condition but lower mileage (229,600 km) sold for 35,000 SAR on 14 Oct 2024. Another 2016 model with the same variant and higher mileage (233,000 km) sold for 34,500 SAR on 16 May 2024. These prices suggest a range of 34,500 to 35,000 SAR for similar cars with lower mileage. The listed prices for similar cars with higher mileage (around 260,000 km) range from 39,000 to 44,000 SAR, but these are generally higher than selling prices. Considering the higher mileage of the car in question (312,000 km), I adjusted the estimate downward from the selling prices of similar cars with lower mileage. The estimated market price reflects the depreciation due to higher mileage and average condition.