(Undated) -- Gas prices at their cheapest in Rhode Island are getting down to just a few cents over the two-dollar-per-gallon mark. RhodeIslandGasPrices.com says the average price statewide is currently at two dollars and thirty cents, which is down a dime from one month ago. Going back to one year ago, the average price was two-sixty-three, but then gas shot up to almost three dollars per gallon.