To estimate the price of the 2018 Alfa Romeo Stelvio I4 2.0L Turbo Charged Quadrifoglio, I first considered the selling prices of similar cars. A similar car with 82000 km mileage sold for 90000 SAR in February 2024, and another with 35000 km sold for 104500 SAR in July 2024. The car with higher mileage and similar condition to the target car sold for 90000 SAR, which is a strong indicator. Next, I looked at listed prices. A car with 69500 km was listed for 87500 SAR, and another with 75000 km was listed for 96000 SAR. These listings suggest a market range between 87500 and 96000 SAR. Considering the target car's mileage of 71000 km and average condition, I estimate its market price to be slightly above the lower end of the range, closer to the 90000 SAR selling price.