I ordered from Germany (would happen anyway with the B12's) and cost including postage was 760 EURO. That's around $900ish AUD. Just make sure you pay via PayPal since doing bank transfer stuff is frought with fees and hidden costs.
B12's are great quality and top name brands engineered to work together. On a Gen 1 3MPS, the ride height is close to stock (25mm front and 15mm rear drops are hardly noticable) but when driving on highways, you get a slight increase in cabin noise. For someone who doesn't track their car and drives it as a daily, they are great! Not uncomfortable, no knocking etc etc. Given the drop is minimal, there is hardly a need for installing sway bars etc as others have had to do, especially on the rear.