Pending home sales are down for the third month in a row this year simply due to lack of inventory. This is especially true if you’re looking to purchase homes for sale in Waltham MA. Not one of the regions in the United States saw an increase in sales over the month of May (NAR), which means that now is an ideal time for homeowners to list their homes for sale. Buyers are on the lookout and available affordable homes are are just simply hard to come by.