To estimate the price of the 2018 Mercedes C300 I4 2.0L Turbocharged Top, sedan, with 82400 miles and American specs in average condition, I considered the following data points: 1. A 2019 Mercedes C300 I4 2.0L sedan with 194000 miles, European specs, in good condition, sold for SAR 109500 on 2024-03-13. Given the higher mileage and better condition, this car's price suggests a lower value for the target car. 2. A similar 2018 Mercedes C300 I4 2.0L Turbocharged Top, sedan, American specs, with the same mileage, is listed for SAR 103500. This is a direct comparison but listed prices are generally higher than selling prices. 3. Other listed prices include a 2019 model with 68000 miles for SAR 138500, a 2016 model with 102000 miles for SAR 88500, and a 2017 model with 124000 miles for SAR 70500. These provide a range but are less directly comparable due to differences in year, mileage, and specs. Considering the selling price of the 2019 model and the listed price of the exact match 2018 model, I adjusted for the average condition and current market trends to arrive at the final estimate.