Dominica if you are buying a digital camera and want to have service here in Australia then you should buy it here in Australia. If you are travelling and purchase a product over $300 before leaving Austalia within 30 days of travel you can claim the GST back on the purchase.

If you aren't an aussie and are returning back overseas then you need to know the warranty of the country you live in (but I suspect you are an aussie).

B&H are excellent and they do deliver to Canada, but they don't like delivering anywhere other than the address of the credit card holder, so that might stump you there. Most good companies are the same as well, for your own protection.