5. Billionaire Row Mansion
Just two weeks ago, an unfinished, 21,888-square-foot mansion on “Billionaire Row” in San Francisco, Calif., was listed at $38.5 million, making it the most expensive home for sale in the city. It was put on the market by Peter Sperling, the owner of the University of Phoenix, who had originally listed it for $65 million in 2007 but received no offers. (So, in a way, $38.5 million is a bargain!)
