To estimate the price of the 2018 Porsche Cayenne S V6 2.9L Twin Turbo, I first looked at the selling prices of similar cars. The 2016 Porsche Cayenne V8 4.8L Turbo Charged sold for 185,000 SAR, but it has a different engine and is older. The 2020 Porsche Cayenne V6 3.0L sold for 255,000 SAR and 220,000 SAR, but these are newer models. The 2018 Porsche Cayenne V6 3.0L sold for 204,600 SAR, which is closer in year and condition but is a base variant. Considering the 2018 model is a top variant, it should be priced higher. I also looked at listed prices: a similar 2018 Porsche Cayenne S V6 2.9L Twin Turbo is listed for 275,000 SAR, but listed prices are generally higher than selling prices. Factoring in the depreciation and the condition of the car, I adjusted the price downwards from the listed price.