Seems like a decent price for a headset.
I have been looking for a budget headset for a while, ThermalTake seem to be fairly reputable, and while I doubt these ever sell at £34.99, the next lowest price I can find for these is £18.98 at Amazon.
Limited stock available, so I was tempted not to bother, but maybe someone can get the benefit :)
**Edit: The price shown is for 2nd class delivery. If you want them more quickly, the price will be more.