I had originally thought that it would be cheaper to purchase in HK as well, to save on taxes. And it is, don't get me wrong.. but it also depends on where you live (the amount of the tax) and the amount of the goods that you are buying. I had originally wanted to purchase two items, and I had actually called HK to find out the amount of the items in USD. The amount is essentially the same, but with an additional (approximate) $5, give or take. Where I'm from, the tax is 8.375%, so purchasing from HK would be most ideal, but with Eluxury, no tax is charged and now the shipping is only $12.50. That, combined with savings from ****** (3%), you should really do the math and see what is most beneficial to you. I had taken advantage of the recent free shipping so I decided to purchase from Elux instead. But with having said that, I don't know if you are based in the US or outside, because Elux does not ship to outside of the US.
Hope this helps!!
Sorry for the long post!!