To estimate the price of the 2015 Lexus LS460 L V8 4.6L Standard with 173500 km mileage in average condition, I first considered the selling price of a similar car with 144103 km mileage sold for SAR 125000 on 2024-07-05. Given the higher mileage of the target car, I adjusted the price downwards. Next, I looked at listed prices of similar cars: one with the same mileage listed for SAR 127000, and another with 144103 km listed for SAR 128500. Considering these listings are generally higher than actual selling prices, I further adjusted the estimate downwards. Finally, I reviewed other listings with varying mileages and conditions to ensure consistency in the market trend. Based on these data points, I arrived at a reasonable market price estimate.