How low can gas prices go? In Southern California — and across the country — prices have been dropping for months, placing extra dollars in consumers’ wallets. This week the average price for a gallon of regular hit $3.24 in Los Angeles and Long Beach, the lowest in four years, according to AAA. In Orange County, it was $3.19. Energy analysts say it may go lower. “We could see gasoline prices in the high 2s,” said Amy Myers Jaffe, executive director of energy and sustainability at UC Davis.