I started by examining the selling prices of similar cars. The most relevant data point is the 2015 Infiniti QX80 V8 5.6L Limited Edition with 142700 km sold for 102000 SAR in February 2024. This car is similar in variant and year but has lower mileage and better condition than the target car. The 2014 model with higher mileage and similar condition sold for 76000 SAR in May 2024, indicating a lower bound. The 2016 models sold for 87000 and 80500 SAR, but they were in better condition. The listed price of a similar 2015 model with 157000 km was 113000 SAR, but it was delisted, suggesting it might not have sold at that price. Considering the target car's higher mileage and average condition, I estimate its market price to be slightly lower than the 2015 model sold for 102000 SAR, accounting for the condition and mileage difference.