To estimate the price of the 2013 Ford Taurus V6 3.5L SEL (Mid) with 257500 km mileage, I focused on the selling prices of similar cars. The most relevant data point is the 2014 Ford Taurus SEL (Mid) with 285000 km sold for 35500 SAR on 2023-09-30. Another 2014 SEL (Mid) with 311000 km sold for 31000 SAR on 2024-04-07. These cars are similar in variant and condition. The 2013 Ford Taurus SE (Base) with 359000 km sold for 25000 SAR on 2024-08-29, but it is a lower trim. Considering the target car's mileage and condition, I estimate its price slightly higher than the 2013 SE (Base) but lower than the 2014 SEL (Mid) with higher mileage, around 30000 SAR.