Greater Des Moines house sales bolted out of the gate in March, increasing 38 percent from February. Pending sales increased 42 percent month-to-month, according to a release from the Des Moines Area Association of Realtors. Agents closed on 735 sales last month, up from 533 in February. The median sales price was $148,500. Contracts were written for 1,148 sales in March, compared with 809 in February. The year-to-year numbers were down slightly, with 1,176 contracts written in March 2013 and 779 sales completed. The median sales price a year ago was $152,000.