no worries, I'm a patient man, though you should be able to get a pretty accurate quote off the Auspost website, all you have to do is enter, parcel size, weight and starting and finishing postcodes. If you need a box they have price lists and sizing too.
Either way, I'm going to be out of town from Wednesday to Monday this week for my wifes 30th, so there's no hurry unless you need the money quickly. I should be able to check PM's and follow up bank payments from my phone.