When buying from overseas it is highly recommended that you ask for the item/s to be shipped by air mail (global or priority), especially with breakables or high value items. If you elect for surface, it generally takes 3 months for the item to arrive in Australia from the US and other countries. Also always ask for full insurance in case of damages, breakages or if the package goes missing.
Never ask for the seller to mark the item as a *gift* on the customs form as that is outright lying and severe fines can be issued. It is ILLEGAL to lie on the customs form so don't put the seller or yourself in that position.
If you act with honesty and integrity then you will 9 times out of 10 have a wonderful and successful transaction.