Make sure you buy them from one of the stockists on the offical GHD website. When mine broke 11 months after buying them I sent them back to GHD for repair, I didn't have a reciept but because they were bought from a listed supplier they replaced mine with a brand new pair for free within a week! I was very impressed.
Like SUburbanbird says it's hard to get them at a discounted price so be careful online there are lots of sites selling fakes.xx