If you want brand name stuff ebay is generally best place to go. If you're after bulk protein on the cheap then check out protein direct dot com dot au and bulk nutrients dot com dot au.
Thanks, I expected it to be cheaper because it didn't have group classes/treadmill area but guess I was wrong. My Goodlife membership is $51 a month (paid a year in full).
I go to BN for all my supps, but their protein tastes really awful. For an extra ~$5 you can go to protein direct dotcomdotau and get much tastier stuff.