I am an ilford dealer in USA.

I suspect one of two things.

Either the camera store you are buying it from is marking it up more, which can be because of their shipping costs or other issue or it costs Ilford Aus. to get it from Switzerland.

I have in a pinch had to get P3 bleach form a secondary source and I had to pay US$25 extra to have it shipped :-)

Good Luck,