$1.99 for Shell Regular in Laurel, MD. It's several miles out of my way, but it's also always a nickel cheaper than any local ("A list") station. Premium is 20-25 cents more.
(Bloodshot, try Houston, worst place for breathing I've lived in since leaving L.A.... Mm, the "speed bumps" on the Interstates down there weren't much fun, either. --And DC folks complain about their pot holes!)