Beckingham Palace up for sale

But now the Beckhams have decided to make it more permanent and are to put their famous English residence Beckingham Palace up for sale.
David and Victoria are having their Hertfordshire mansion, believed to be worth around £18million, valued by estate agents.

Read more: http://www.dailymail.co.uk/tvshowbiz/article-2119709/David-Victoria-Beckham-sell-Beckingham-Palace.html#ixzz1q7JbFOXo
Is this news? In Sept 2010 it was also up for sale.
So really it's a story of them having had their house on the market for 2 years.
Can't see it on rightmove.
Maybe they need Phil Spencer to be their secret agent?