Someone pointed me towards
www.bookdepository.co.uk which has free shipping to anywhere in the world factored into all its list prices. I did a quick comparison and found that it was at least 10% cheaper to buy a print book from the UK (including shipping to the other side of the world) than to buy the ebook from Dymocks in Australia.
This just highlighted to me how ridiculous book prices in general are in Australia.
Also Dymocks doesn't really have any bestsellers in its digital catalogue. Does anyone know why this is?