I use coinjar for the ability to sell in AUD, and Coinbase to receive (because it has website shopping cart plugins), but you can't sell on Coinbase in Oz.
From what i can see Coinbase offer the cheapest AUD buy price. Is that correct or does anyone know of a cheaper place to buy BTC with AUD?
Also what's the buy process with Coinbase? do you buy with credit card? do you have to store your credit card details on the their site?