The stratospheric rise of Purplebricks

It's the AIM-listed company with what's been described as a 'stratospheric' valuation. Purplebricks is a new breed of estate agent with an online focus. It made headlines when it raised almost £50mil in around 24 hours last week to fund a US expansion. It's now valued in the region of £647mil - close to the major players Countrywide and Foxtons. So what's behind the rise? Share Radio's Peta Fuller reports.