Its been awhile since drivers saw gas prices as good as they are right now. The local average according to AAA Mid-Atlantic is $2.86 per gallon. Prices are eight cents better than one week ago and much better than the $3.20 average one year ago. While it is unclear how far gas prices can go down, analysts believe prices will continue to slip through the end of the year. The current price is the lowest it has been in almost four years, according to the agency.