To be honest I have no idea how they go, but I have not been in and not had other punters in there as well.
I go to the one at Asquith because it is closer (< 2 K's) and open Sundays and has a really good range (think Alladdins Cave) and is very friendly and helpful and has parking at the door (if you're not walking).
After this plug, I should hit them up for a freebee. I have no interest in the shop except that I like having it there.
The fellow at Thornleigh's range is much more limited and he is not open Sundays, but he will sell grain in mini mash size (150gm) bags.
Oh, and both local supermarkets and Kmart have mass market brew stuff too.
Cheers (and so ner)
Greg