Flaxen
A standard deck of 36 cards plus extra/expansion cards of 94, I think (which can be bought as singles) ... add shipping ... close to A$150 in total ... expensive. And, using the base deck alone is probably not going to give you the same level of readings as you would get if you have all the cards (or many of them) I suspect. Nice deck otherwise, and I'm sure it is a gem. I really like the concept having looked at this deck when it was first released, but even buying the base deck alone is expensive ... around A$48, which includes shipping, for 36 cards.
I only use the standard deck- never bothered with any extension packs.
That is expensive to ship to you though. I was lucky enough to find it in a local shop as I'm UK based and so are the creators.