Kara DioGuardi Breaks Rule No. 1 for House Listings

The cardinal rule of real estate pricing -- let's call it the Wal-Mart rule -- is that you price your home with a number ending with the digit "9," not "0." Not only does it sound more bargain-like, but the listing will pop up in the lower-priced searches if it ends in "9."

Apparently, former "American Idol" judge Kara DioGuardi has never shopped at Wal-Mart. She just priced her home in Studio City, Calif., at $10 million.