That's too bad that everything is so expensive in NZ.
As for A-data, they are ok I guess, just they are pretty low on the totem pole imo.
There are better companies and products.
As for overseas, I do it all the time.
I'm in Japan atm, and I bought my whole desktop off newegg and shipped it from the states.
First try on the build all parts worked.
And I buy misc comp parts and other things from amazon, never had a problem.