The May stats are discussed in this MassLive.com article in today's Business Section. "In Hampshire County, sales rose 10 percent from 101 to 111 and the median price rose 7.6 percent from $235,000 to $253,000," according to the REALTOR® Association of the Pioneer Valley. Inventory is down 16.2% from this time last year, while mortgage interest rates rose to 3.81 percent in May, up from 3.75 percent a year ago, according to FreddieMac.com. For more information about Hampden and Franklin counties' May stats. read on…