To estimate the price of the 2019 Ford Taurus V6 3.5L SE (Base) with 155000 km mileage, I first looked at the selling prices of similar cars. The closest match is the 2019 Ford Taurus I4 2.0L SEL (Mid) with 169000 km sold for 55500 SAR on 2024-01-05. Given that the V6 engine typically commands a higher price than the I4, I adjusted upwards. Next, I considered the listed prices of similar cars. The 2019 Ford Taurus V6 3.5L SE (Base) with the same mileage is listed for 72000 SAR, but listed prices are generally higher than selling prices. Other listings for similar models range from 45000 to 80500 SAR, with the most relevant being the 2018 Ford Taurus V6 3.5L SE (Base) with 99555 km listed for 62500 SAR. Considering the car's condition is not specified as excellent, I adjusted the price downwards slightly from the higher end of the range. Finally, I factored in the depreciation and market trends to arrive at a balanced estimate.