Saw not one, not two, but THREE Barbera Red E90s today, and a Deep Green Metallic E90. Those are colors I never see, and I saw noticed them all in one day.
Also, saw an Interlagos Blue E92 M3 yesterday. Not a test drive, either, but a customer car.
All of these in Ashburn, VA. M3 was on Waxpool Rd, turning left on Farmwell Rd (near the Shell station).