If you can buy bitconi anonymous, without any id, than its good and might be worth paying more than exchange fees. If ID is required, I prefere to stay with exchanges, as prices there will be considerably cheaper than in the newstands for sure.
When buying from exchanges, you first have to provide the ID, then wait to get verified before you're allowed to buy/sell and you have to use one of the payment methods accepted by the site which further delays the procedure, whereas when buying from over the counter, you can do it instantly, even if ID is required (which I am sure it will be) many will still prefer to buy bitcoins this way, I just hope that cash is also accepted. As for the fee, it is mentioned in the article already.
A minimum amount of AUD50 will have to be purchased at a time, however, which will be subject to 4% commission.