This is currently in stock at Powerplay Direct for £13.99 delivered. Add the 2% discount code PP-02-DISCOUNT and this brings the price down to £13.71. Don't forget to go through Quidco for another 4%, this works out around 53p, making it £13.18 delivered!
I know that games are never to everyones taste but this is a really good fun game - especially for the kid's.
EDIT - Now costs £20.99 before discount on website