To estimate the price of the 2017 Toyota Fortuner I4 2.7L GX2 2WD (Base) with 137500 km mileage and average condition, I focused on the selling prices of similar cars. The most relevant data point is a 2017 Fortuner with 241000 km in average condition sold for 64000 SAR on 2024-02-27. Given the lower mileage of the target car, it should be valued higher. A 2016 model with 224500 km in average condition sold for 62000 SAR on 2024-03-31, and a 2015 model with 251000 km in average condition sold for 49500 SAR on 2024-09-18. Considering the target car's year, mileage, and condition, I estimate its price to be slightly higher than the 2017 model with higher mileage but lower than the listed prices, which are generally higher than selling prices.