I've just noticed these pants from Helly Hansen at a great price. Purchased some for the winter and ski season - they're fantastic quality and I can definitely recommend a few at this price. Also ideal for running and cycling.
Check out the other Helly Hansen products available cheaply on Amazon.
EDIT: These have now gone up to £8.64 but I thought I'd just update this post as this is still a steal
EDIT EDIT: These have gone back lower and are showing as £7.67 - an absolute bargain.