To estimate the price of the 2015 Ford Taurus V6 3.5L SE (Base) with 200129 km mileage in average condition, I first looked at the selling prices of similar cars. A similar car with 162000 km sold for 50300 SAR on 2024-04-04, and another with 200000 km in good condition sold for 39500 SAR on 2024-08-06. Given the target car's higher mileage and average condition, its value should be lower than the 50300 SAR car but closer to the 39500 SAR car. Next, I reviewed listed prices: 42000 SAR for a car with the same mileage, 41500 SAR for a car with 200500 km, and 40000 SAR for a car with 185053 km. These listings suggest a market range of 40000-42000 SAR. Considering the actual selling prices and the listed prices, I estimate the market price to be around 41000 SAR.