Paul Anastos, president of Mortgage Master, thinks the DeSantos could be missing out on a great opportunity by waiting it out. "If your children are off to college and you happen to be in a much sought after location or a good school district, you may want to consider selling now. You'll get a lot of bang for your buck," Anastos says. With mortgage rates of all types at or near their lowest levels in history, Anastos says he is seeing competitive bids -- three or four offers for a single property -- and houses being bought at the full asking price. According to Zillow, the 30-year fixed-rate mortgage has an interest rate near 3.5%, while the 15-year fixed-rate mortgage has a rate less than 2.9%, each for the most highly qualified borrowers.