From NBC:

Is The White House for Sale?

As we looked through the latest properties to hit the market this weekend, we came across a rather famous address that is apparently now for sale: 1600 Pennsylvania Avenue NW -- aka The White House.

Redfin has the executive lodging listed for $10 million. The 55,000 square-foot property has a price per square foot of $182.

http://www.nbcwashington.com/around-town/real-estate/Is_The_White_House_for_Sale_-96258284.html