Hereâs a look at the local, state and national prices. Local prices In Killeen, Gasbuddy.com users reported the cheapest gas selling for $2.48 per gallon at Walmart, 3404 W. Stan Schlueter Loop. Samâs Club at 600 W. Central Texas Expressway was selling the cheapest gas in Harker Heights on Saturday at $2.42 per gallon. In Copperas Cove, gas was last reported as selling for $2.43 per gallon at Chevron, 1306 Georgetown Road, GasBuddy.com users reported. Gasoline was last reported as selling for $2.37 per gallon at AAFES on Fort Hood, including 1002 761st Tank Battalion Avenue, according to GasBuddy.com. State, national prices The statewide gas price average is $2.60, which is 11 cents more last week and 60 cents higher than a year ago, according to AAA.