RICHMOND, Virginia, 2016-Sep-09 — /EPR Retail News/ — CarMax, Inc. (NYSE: KMX), the nation’s largest retailer of used cars, today (September 8, 2016) celebrated the grand opening of its first store in Idaho, located in Meridian at 4043 E. Elden Gray Street.  The Meridian store will stock more than 200 used vehicles of nearly every make…