To estimate the price of the 2021 Porsche Cayenne Turbo V8 4.0L Twin Turbocharged, I first looked at the selling prices of similar cars. The 2022 Porsche Cayenne GTS V8 4.0L Twin Turbo with 10035 km sold for 11496 SAR, but this price seems to be an outlier. The 2020 Porsche Cayenne V6 3.0L with 77000 km sold for 255000 SAR and 220000 SAR, indicating a range for older models with higher mileage. Next, I considered the listed prices of similar cars. The 2021 Porsche Cayenne Turbo V8 with 44200 km is listed for 523500 SAR, and another 2021 model with 40000 km is listed for 320000 SAR. The 2020 model with 65000 km is listed for 419500 SAR. Given the average condition and mileage of the target car, I adjusted the price downwards from the highest listed price but kept it higher than the older models. This led me to a final estimate.