I have backed at PDF level as I do not like to back a pig in a poke ... depending on a variety of factors (mostly how much effort a creator cares to put into their search for the cheapest shipping rates, but also, to a degree, how many things they are shipping) shipping to Australia can vary from the not quite reasonable to the the ridiculously extortionate. Where do you plan to ship/not ship to? And, yes, while I realise that shipping rates can change, almost always upwards, at the drop of a hat these days, do you at least have an idea of what the estimarted cost would be *curreently* for shipping to various locations? (One way to save for backers outside of Canada would be to offer a DTRPG PoD option since, for example, there is now a DTRPG printer in Australia, in Melbourne, and shipments are done by domestic post!)