To estimate the price of the 2021 Toyota Fortuner V6 4.0L VX1 (4X4) with 71500 km mileage, I primarily considered the selling prices of similar cars. The most relevant data points are: 1) A 2021 Toyota Fortuner V6 4.0L VX1 (4X4) with 29000 km sold for 120000 SAR on 2024-04-15. 2) Another 2021 Toyota Fortuner V6 4.0L VX1 (4X4) with 71500 km sold for 122157 SAR on 2024-07-04. 3) A 2020 Toyota Fortuner V6 4.0L VX1 (4X4) with 81000 km sold for 111000 SAR on 2024-06-19. Given the close match in mileage and condition, the most recent sale of a similar car at 122157 SAR is highly relevant. The listed price of 123000 SAR for a similar car also supports this range. Considering these factors, I estimated the market price accordingly.