To estimate the price of the 2013 Mercedes S300 V6 3.0L Twin Turbo with 131500 km mileage, I considered the following data points: 1) Offers accepted by sellers: SAR 56000 for a car with 158000 km on 2024-02-12 and SAR 80500 for a car with 89000 km on 2024-04-15. 2) Listed prices: SAR 55000 for a car with 158000 km, SAR 79000 for a car with 89000 km, SAR 74000 for a 2012 model with 166000 km, SAR 103000 for a car with 211000 km, and SAR 52500 for a 2011 model with 275500 km. The most relevant data points are the offers accepted by sellers, which are SAR 56000 and SAR 80500. Considering the mileage and condition of the target car, I estimated the price to be between these two values, leaning towards the lower end due to higher mileage compared to the SAR 80500 car.