Must have run out of stock.
Considering it is a board with USB 1.1 ports, I think its safe to say it was end-of-life for a while. This didn't stop it from being an excellent keyboard.
I think some of the clever lads at OCUK got a load of them for a great price, hence they were able to offer such a high-end gaming keyboard for such a low price. Shame to hear it is no longer around.