Where can you get the eleventh doctors sonic screwdriver?

There are lots of places where you can get the 11th Doctors sonic screwdriver but the cheapest one I can recommend is Forbidden Planet who are selling it for £13.99. Other places I know you can get it from are Amazon, Galaxy 4, Ebay but some of those places can be pretty expensive for one as the cheapest on Amazon is £18.99 and then there isn't P&P charges added to it. Hope I can be of help :) x