around $45 per 5lb of name brand protein like ON, All the Whey, BSN, Cytosport, etc is pretty standard. I have to do the math to feel decent about spending that kind of money though. You can get gemma protein dirt cheap and it's fairly high in BCAA's, but, better brand wheys are more diverse in their amino acid make up, and a bit more palatable. Honestly I'm not willingly paying
beyond $35 when I buy a 5lb whey, but generic brand whey is so hard for me to choke down, and I want every aspect of bodybuilding to be as enjoyable as possible. It is life consuming, after all.