This is an amazing price on this controller it's been selling for quite a lot, around the £30-£40 mark since it was released over a year ago but i sense Amazon is trying to clear this product out of there store room forever, so be quick to take advantage of this great deal.
The controller is £8.99 and £1.99 for delivery but if you order a further £6 from Amazon (which is easy) or buy 2 controllers, delivery will then be completely free.
The next lowest price i've found is £29.99, so that's about 70% off the 2nd cheapest price.
Also don't forget to go through http://www.cashback-rewards.co.uk
for 3.5% cashback from Amazon and you'll receive £5 for joining there Quidco type system.
Hope that helps. :)