From what I have heard, anybody that supplies the Bose headsets in AU has to sign a contract with Bose that they wont sell below a specified price. Now, im not sure what the suppliers (such as concept aviation etc etc) buy it for, but $1495 seems to be the lowest youre going to be able to buy one. I think the best deal you'll be able to get is $1495 shipped.
Having said that, I do know of someone who bought 6 for his helicopter and was given a good deal, so its obvious that there is room to play with, however; Bose want their product to be top shelf and they want it to stay there, so if youre looking to buy individual units, i think youre out of luck.