Next best is £3.99 at Amazon UK. Great price for a 2010 DVD release.
Chris Pine (Star Trek) stars in this intense, gripping thriller about a deadly threat beyond anyone's worst nightmare. Determined to escape a lethal virus, four teens set out in search of an uncontaminated refuge, only to discover that they are far more dangerous to each other than the virus they are trying to survive. Carriers is a pulse-pounding journey into a world where laws and rules no longer apply, and no one can be trusted, not even your friends.