To estimate the price of the 2019 Porsche Cayenne V6 3.0L Twin Turbo S (Mid) with 123500 km mileage, I first looked at the selling prices of similar cars. The closest match is the 2020 Porsche Cayenne V6 3.0L S (Mid) with 77000 km, sold for SAR 255000 and SAR 220000 in early 2024. Considering the 2019 model and higher mileage, a depreciation adjustment is necessary. The 2018 Porsche Cayenne V6 3.0L with 146000 km sold for SAR 204600, which provides a lower bound. The listed prices for similar 2019 models range from SAR 220000 to SAR 256000, but these are generally higher than actual selling prices. Factoring in the car's age, mileage, and market trends, I adjusted the price downward from the 2020 model's selling price to account for the additional year and higher mileage.