Strong demand and still limited supply mean homes are now selling nearly three times as fast as they normally would.
The average number of days a listing stayed on the market in April was 46, down from 62 in March, and down from the normal pace of 90-120 days, according to the National Association of Realtors.
"I have a seller, his house came on, he got a full price offer, and he refused to take it because he wanted multiples. Really?" asked Jane Fairweather, a real estate agent in Montgomery County Maryland, a suburb of Washington, DC.
(Read More: Map: Tracking the US Real Estate Recovery)