I started by examining the selling prices of similar cars. A 2016 Mercedes C300 with 111846 miles sold for AED 47000 in May 2023, and a 2015 model with 79500 miles sold for AED 46000 in November 2023. The 2017 coupe variant sold for AED 54000 in July 2024, but it's a different body type and variant. The 2018 sedan with Canadian specs sold for AED 60500 in August 2024, but it's newer and has different specs. The offers accepted for 2016 models were AED 51500 and AED 55000 in November 2023, indicating a higher potential value. Listed prices were AED 46000, AED 60000, and AED 50000, but these are generally higher than selling prices. Considering the car's mileage of 121000 miles, which is higher than the sold cars, and the average condition, I estimate the market price to be slightly lower than the accepted offers and closer to the lower end of the selling prices.