When we last covered CarMax, Inc. (NYSE:KMX) we suggested a buy sub-70afewmonthsagowhenthestockgotnailedfollowingQ4earnings.KMXisastockthatweroutinelycover,asitprovidessomeinsightintobothcardemandandthestateoftheconsumer,andtrendsininflationinusedcarpricing.WehavetradedKMXsuccessfullymanytimes,andfollowingthelastbuycall,itralliedfromthehighs60's to over $75. But otherwise, shares have been mostly sideways. We think shares can be bought on the n ...