To estimate the price of the 2015 Infiniti QX60 V6 3.5L Luxe Sensory with 172897 km, I first considered the selling prices of similar cars. A 2015 model with 115000 km sold for 64500 SAR in October 2023, and a 2015 model with 283000 km sold for 35000 SAR in October 2024. The 2014 model with 138000 km sold for 62500 SAR in June 2023, and another 2014 model with 213000 km sold for 38000 SAR in October 2024. The target car's mileage is between these examples, so its price should be between 35000 SAR and 64500 SAR. I also looked at listed prices: a similar car with 173000 km was listed for 49000 SAR, and another with 192000 km was listed for 60000 SAR. Considering these data points, the estimated market price is closer to the lower end due to the higher mileage compared to the 115000 km car that sold for 64500 SAR.