To estimate the price of the 2011 Mercedes E300 Avantgarde V6 3.0L Standard, I first considered the selling prices of similar cars. A 2012 model with 156800 km sold for 36500 AED, and another 2012 model with 133000 km sold for 30000 AED and 29500 AED. A 2013 model with 186000 km sold for 36000 AED, and another 2013 model with 155100 km sold for 44500 AED. A 2011 model with 140000 km in good condition sold for 37500 AED. The 2011 model in question has higher mileage at 225500 km and is in average condition, which suggests a lower price. An offer of 30000 AED was accepted for a similar 2011 model with 194790 km. A similar car was listed for 32000 AED. Considering these data points, the estimated price should be slightly lower than the accepted offer and listed price due to higher mileage and average condition.