Ghduk.org has a rating of 1.0 star from 1 review, indicating that most customers are generally dissatisfied with their purchases. Ghduk.org ranks 21st among GHD sites.
I would stay away as that site does not look very legitimate. If you do a search for GHD on sitejabber you can find the official GHD site and a link to where they will tell you the sites that are legit vs illegal.