The only realy thing I'd be a wincy bit concerned about is GST. I've heard customs can add shipping costs to the total... Maybe it's just an old-wives tale.
Not an old wives tale - it's true. If goods + shipping cost exceeds AUD1,000 you risk getting hit for GST on the lot. We recently did a group order to Freestyle from APUG Oz members and we opted to take the prudent path of splitting the order into three different orderers/receivers.