I have got a lot of clothes for DD off Ebay. Baby clothes don't have a lot of wear and tear (until they start crawling!) so generally second hand clothes are in really good condition and look almost brand new. Maybe try the Salvos as well?

And I second that once people know you are having a baby, you will have freebies coming out your ears! I got so many clothes from just work colleagues that I didn't have to buy much at all for her as a newborn.