I started buying my protein at trueprotein.com you could get two pounds of WPI for something like 15bucks! And that is with a flavor added in! You could make a combination of different proteins like 60%WPC with 40%WPI or vice versa. Hell you can make a night time shake formula with MPI, which is almost identical to Micellar amino acid profile breakdown, but almost half of the price.

That's why I can't justify buying from the health food stores, this is of course for myself. If you got a certain flavor that you like and can't be emulated then switching to save a few bucks is not worth it. I'm having a hard time getting away from Biotest's Low-Carb grow, because of taste.