To estimate the price of the 2018 Ford Taurus V6 3.5L SE (Base) with 222000 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. Considering the 2018 model year and higher mileage, the price should be lower. The 2020 Ford Taurus I4 2.0L SE (Base) with 114200 km sold for 82000 SAR on 2023-09-05, but this is a newer model with lower mileage. The listed prices for 2018 Ford Taurus V6 3.5L SE (Base) with similar mileage are 62000 SAR and 60500 SAR, but these are higher than expected selling prices. Considering depreciation and the higher mileage, I adjusted the price downwards. The 2016 Ford Taurus V6 3.5L SE (Base) with 211000 km listed for 48000 SAR is a good reference, but the 2018 model should be slightly higher. Factoring in all these data points, I arrived at a reasonable estimate.