To estimate the price of the 2018 Ford Expedition XLT V6 3.5L with 117000 km mileage, I considered the following data points: 1) Selling prices of similar cars: A 2019 Limited variant sold for 125000 SAR and 148000 SAR, and a 2020 XLT 4WD sold for 138000 SAR. These are higher trims and newer models, so they should be adjusted downwards. A 2016 XLT (Base) with 190000 km sold for 45000 SAR, and a 2016 EL XLT (Base+) with 93000 km sold for 61000 SAR. 2) Listed prices: A 2018 XLT (Base) with 117000 km is listed for 115000 SAR, and a 2017 XLT (Base) with 120000 km is listed for 89000 SAR. Considering the condition and mileage, the estimated price should be lower than the listed price but higher than the older models' selling prices. 3) Depreciation logic: A new car price for a similar model would depreciate by approximately 10% per year. Combining these factors, I arrived at the final estimate.