GasBuddy.com says the average price of gas in Illinois fell 7.2 cents in the past week down to $2.30 a gallon. Prices have been dropping for 26 straight days. The national average in the past week is down 3.4 cents. In Decatur gas is as low as $2.07 a gallon, certain gas pumps in Champaign have gas at $2.02 a gallon and the lowest seen in the Central Illinois area according to GasBuddy.com has been in Springfield where gas at certain stations is $1.93 per gallon.