To estimate the price of the 2014 Ford Expedition V8 5.4L XLT (Base) with 191000 km mileage and in good condition, I analyzed the provided data points. The most relevant selling prices are: SAR 41000 (158000 km, average condition, sold on 2024-01-03), SAR 48000 (174000 km, average condition, sold on 2024-03-25), SAR 31000 (163000 km, average condition, sold on 2024-04-04), SAR 51500 (188000 km, condition not specified, sold on 2024-04-26), and SAR 45000 (149000 km, good condition, sold on 2024-08-04). The listed prices for similar cars range from SAR 31000 to SAR 52000. Considering the car's higher mileage and good condition, I adjusted the estimate slightly lower than the highest selling price but higher than the average selling prices.