 Money News, 10 and 40 past the hour. Here's Dan Ronan. Gasoline prices keep falling as oil prices dip amid declining demand for oil. The U.S. Energy Department says a gallon of unleaded is now 13.5 cents less expensive than it was a year ago at $3.44 a gallon. Gasoline prices in D.C. average $3.66 a gallon. Maryland, $3.58. A gallon of gasoline in Danville, Virginia can be bought for $2.90 a gallon.