Where is the best place to buy cheap contact lenses?

My girlfriend always purchases hers at http://www.smartbuyglasses.com. She is really satisfied with them, and according to her they are also one of the cheapest out there (while still delivering good service).

You can find the price quote at their website, since the price depends on the type of lenses and stuff like that. As far as I recall it right, her yearly disposable contact lenses did cost $ 25,- (I think she uses coopervision zero something). Besides that, she also uses colored contact lenses every now and then, and those costed around $ 35,- per package (of 4 or 6 lenses).