To estimate the price of the 2018 Nissan Maxima V6 3.5L SR1 (Top) with 150500 km mileage in average condition, I considered several data points. The most relevant selling price is a 2018 Maxima SR1 (Top) with 109000 km in good condition sold for 75000 SAR on 2023-11-01. Adjusting for higher mileage and average condition, the price should be lower. Another 2017 Maxima SR1 (Top) with 187000 km in average condition sold for 60500 SAR on 2023-09-21, indicating a lower price for older models with higher mileage. A 2016 Maxima SR1 (Top) with 100000 km in good condition sold for 60000 SAR on 2023-11-05. Considering the 2018 model's higher mileage and average condition, the price should be between these values. The listed price of a similar 2018 Maxima SR1 (Top) with 150500 km is 62000 SAR, which is likely higher than the actual selling price. Based on these data points, I estimate the market price to be around 58000 SAR.