Virginia gas prices dropped just over 2 cents a gallon over the past week according to price tracking website GasBuddy. The avverage for a gallon of regular is now $3.20. That’s nearly a dime a gallon lower than a month ago but $1.11 a gallon higher than a year ago.The national average is down close to 2-1/2 cents a gallon at $3.32. which is down 9 from a month ago and $1.18 a gallon higher than a year ago.