$ 3.15/gallon yesterday at the Marysville Costco, 40 miles north of Costco. Ethanol-free gas is very hard to come by here in Washington. There are a few listings on pure-gas.com, but last time I checked, there was only one auto pure gas supplier in the state, who gets it from a refinery in Wyoming, or something like that. Airports and marinas will generally not sell it if it is not being pumped directly into your airplane or boat.