Business Insider reports that in September, sales of previously owned homes leaped 9.4%.<br />According to the National Association of Realtors that's a seasonally adjusted annual rate of 6.54 million.<br />This is the fourth-straight month of accelerating sales, and the latest rate is the fastest since 2006.<br />Economists surveyed by Bloomberg expected the sales rate to climb to 6.3 million from August's revised 5.98 million.<br />The US housing market has served as a bright spot in the slowing economic recovery.<br />Record-low mortgage rates have driven more Americans to buy units.