According to data released yesterday by The Warren Group, home sales are soaring across Massachusetts. Even more encouraging, is that most local communities also saw increases. Salisbury saw the largest volume increase of 70 percent while Newburyport and Amesbury saw an increase of 16 and 19 percent respectively. Newbury, Rowley, Georgetown, and Groveland saw sales increase in the 40 percent range. When it came to prices, according to Warren’s data, the median cost of homes — falling over the past six years — on average state-wide inched up in 2012 by 1.8 percent to $290,000, from $285,000 in 2011. Newbury saw the largest combined gains with 78 homes sold in 2012, a 44 percent increase in sales volume and an 18 percent increase in median prices to $417,000, when compared with 2011. Groveland also enjoyed good news of both fronts, selling 64 homes, up 42 percent, and a rise in median price to $313,326, or 9 percent, as well.