(Undated) -- South Carolina continues to have the lowest average for gas prices in the nation. The current state average is three-dollars-and-13 cents per gallon, while the national average is 31-cents more expensive. "Triple A" says fuel prices are still coming down despite geopolitical hotspots like Iraq and Ukraine. That's because domestic oil production is now in high gear. In places like Rock Hill, the price has fallen below the three-dollar mark.