BOSTON (AP) — Massachusetts homeowners still appear reluctant to put their houses on the market, driving sales volume down and prices up last month, two organizations that track the real estate market said Wednesday.

The number of single-family homes sold dropped almost 12 percent in March compared with the same month a year ago, while the median price jumped more than 8 percent to more than $314,000, according to the Waltham-based Massachusetts Association of Realtors.