(MONEY Magazine) – Uh-oh. Nationally, the supply of homes for sale is higher (13%) than it was a year ago. Some markets, like Las Vegas and Phoenix, are still tight, but others have seen a sharp uptick. Are owners trying to get out while they can?

ONE-YEAR CHANGE IN THE NUMBER OF HOMES FOR SALE[1]

SAN FRANCISCO AREA +14%

CHICAGO +16%

BOSTON AREA +36%

SAN DIEGO +50%

NOTE: [1] From August 2004 to August 2005. SOURCE: ZipRealty.