To estimate the price of the 2016 Nissan Maxima SV V6 3.5L with 156000 km mileage in average condition, I primarily considered the actual selling prices of similar cars. The most relevant data point is a 2016 Nissan Maxima SV (Mid) with the same mileage and condition, sold for 54000 SAR on 2023-09-28. Another similar car, a 2016 Maxima SV (Mid) with higher mileage (208000 km), sold for 41000 SAR on 2024-07-05. Additionally, a 2018 Maxima SV (Mid) with slightly higher mileage (163000 km) sold for 56000 SAR on 2024-08-05. Considering these data points and the fact that the car in question has average condition and mileage, I estimated the price accordingly.