I really don't know, but I think that's a negative since Australia's video formats are PAL whereas America's is NTSC. Should you obtain a modchip, it may work.
Should the product be no longer in demand, Nintendo (and many other companies) will most likely stop production of that particular product as to avoid massive profit loss.
I go to PokemonCenter.com very frequently, and I haven't seen them selling Pok?mon BOX since they updated their look for the web site.
And the last time I checked, Pok?mon BOX originally costs $19.99, not $55! (I bought it at that price AT PokemonCenter.com) Since it's not a game, it shouldn't cost nearly that much!
Like Pok?mon BOX, people are now selling the Game Boy Advanced: Pok?mon Center Edition for ridiculous amounts of money as well...