Attn Australian Customers: We ship our cassettes in padded mailers. Postage for one (1) cassette is $9.90. We can post cassettes in a business envelope which will usually cost $2.70 for a single cassette. Please email email@example.com to make these arrangements OR place a note during the checkout process and we will refund the difference. Note: No responsibility will be taken by SoAR for cracked cases/cassettes if posted in this manner. Secondly, due to the rigid structure of the platform we use when trying to calculate postal costs, any excessive postal costs incurred by you (particularly when buying 3 or more cassettes) will be refunded accordingly. Thank you for your understanding.