You can’t use US price as the base though, the lenses aren’t even manufactured in the US and they are making a way bigger profit than that. For example the 135GM from Sony is $2098 USD and the Canon RF 135 is $2099 USD. Now in Australia, the 135GM goes for as cheap as $2300 AUD but the Canon is selling at $3969. Both of these include 10% GST so either Sony is committing so very major tax fraud (unlikely) or Canon is pricing their stuff very fairly in the US and really milking everyone outside the US for all they have!
Again, in Australia you are at the mercy of the increased cost of Canon glass and bodies because they only offer 5 year warranties. Sony offers a 2 years warranty.
If you were to buy the RF 135 from the US with Australian dollars it would cost you $3303.95 at the current exchange rate and would have no Australian warranty. Yes $665 is a lot to pay for an extra 3 years of warranty but still comparing US pricing to Australian is not really apples to apples because of the extra warranty.
Here in Canada the Canon RF 135 in Canada costs $2849.99 CDN before taxes if I was to buy it from the US at the current exchange rate = $2099 USD to CDN = $2877.21 so we are saving a little in Canada over buying in the US. Also many of the US retailers are no longer shipping some items to Canada addresses.
Still just a 1 year warranty in Canada and here in BC you can add 12% to the $2849.99 =
$3191.98 out the door.