Dont really care about the brand I just want the cheapest pure pound.

Any good sites?

I use http://www.dpsnutrition.net/

I used to go to Costco. I don't know if it's the cheapest, though.

you can get 5lbs of whey by Optimum Nutrition for about 25$ off the net. try www.bulknutrition.com

another vote for optimum nutrition, but i get mine from www.bodybuilding.com.

my suggestion is that you should care about the brand. lots of crappy protein mixes out there.

Would also suggest bodybuilding.com and also currently use ON.

Good prices, fast delivery, plus here's a 10% off coupon code: http://www.bodybuilding.com/comebackdiscount.htm

Additionally, they have a great forum. Lots of useful info can be researched there.