If you need to ship products to your customers you need to consider which options you can offer on your ecommerce website.
Here are some of the options and issues:
Pickup (usually free)
Australia post – they offer a online calculator that can be integrated to most websites and gives instant quotes based on the destination.
Free shipping – many sites offer this for orders over a certain value.
Do you offer Australia only or will you ship to Overseas locations.
Do you want to track your shipping and request a signature on delivery.
Do you offer insurance or is this a extra cost.
The shipping options and cost need to be clearly shown to customers during the checkout process so that there is no confusion on what they are paying for.
If you have products that can be downloaded make sure that your shopping cart software can offer this as well.