To estimate the price of the 2013 Lexus GS250 V6 3.0L Standard, I started with the new car price of the 2025 Lexus GS250 Standard Sedan, which is SAR 259500. Given that cars depreciate by approximately 10% per year, the estimated value of a 2013 model would be around 11 years old. Using the depreciation formula, the value would be SAR 259500 * (0.9^11) = SAR 90750. However, considering the high mileage of 312000 km and the average condition, I further adjusted the price downwards. I also looked at a listed price of a 2015 Lexus GS250 V6 2.5L with 215000 km at SAR 72500. Given the older model year and higher mileage of the 2013 car, I estimated a lower price than the 2015 model listed price.