To estimate the price of the 2021 Mercedes E250 E 250 Standard sedan with 53700 km mileage, I considered the listed prices of similar cars. The closest match is a 2021 Mercedes E250 E 250 Standard sedan with 47500 km listed for AED 139000. Given the similar specs and slightly higher mileage of the target car, I adjusted the price downwards. Additionally, I looked at a 2019 model listed for AED 99999 and a 2020 model listed for AED 115000, but these had different body types and higher mileage, so they were less relevant. Based on these data points, I estimated the market price accordingly.