To estimate the price of the 2018 Nissan X-Trail I4 2.5L S AWD (7-Seater) (Mid+), I considered the following data points: 1) A similar car with the same variant and 116592 km mileage sold for 53000 SAR on 2024-06-02. 2) A similar car with a slightly lower variant (S AWD 5-Seater Mid) and 125000 km mileage sold for 56000 SAR on 2023-10-15. 3) Another similar car with the same variant and 114000 km mileage sold for 60000 SAR on 2024-03-26. 4) A similar car with a higher variant (SL AWD W/Safety Shield Top+) and 142000 km mileage sold for 65500 SAR on 2023-10-06. Considering the mileage of 121094 km and the condition being good, I adjusted the price slightly higher than the 53000 SAR sale but lower than the 60000 SAR sale, given the closer match in variant and mileage.