Why does the 2011 already have 43,000 miles? Highway miles?
In case you aren't aware CarMax does not negotiate on price. Period. The advertised price IS the price you will pay.
Have you looked at CPO models at BMW dealers?
There are no major differences between 2008 & 2011. In 2009 there was a mid-cycle "facelift". The front and rear facias were modified and there were a few interior modifications.
www.bmwcca.org member #388003 - Use me as a referral & you could win a one day ///M Driving School!!