To estimate the price of the 2013 Ford Expedition V8 5.4L XLT (Base) with 225,000 km mileage and average condition, I focused on the selling prices of similar cars. The most relevant data point is a similar XLT (Base) variant with 226,463 km mileage and average condition, sold for 26,000 SAR on 2024-09-06. Another similar XLT (Base) with 271,000 km mileage and average condition sold for 31,000 SAR on 2024-01-02. A car with slightly better condition and lower mileage (273,000 km) sold for 35,500 SAR on 2023-09-05. Considering the target car's mileage and condition, the most comparable sale is the one for 26,000 SAR. Adjusting slightly for the target car's mileage and market conditions, I estimate the price to be slightly higher than 26,000 SAR but lower than 31,000 SAR.