Hmm from recollections of adelaide, all the op-shops off rundle st. type district had good stuff. Not sure if it's still the case.
For me, I would love to buy clothes from the following places Irving Baby! Chaos Bazzar Bazzar Copycat aaaand Myer.... but I cant afford to because they all overcharge.
I always go to the cool shops and see what I like, then go to Target and buy whatever's closest. For the coolest stuff (like Thai fishing pants) I go to St Andrews Market up past Hurstbridge.