Hmm.. maybe the rules have changed. But the last time I was taxed, I was definitely paying an exorbitant amount for the freight charges. I called up either Fedex or DHL about it (they had already paid for tax by the time they came to deliver it, so there was no nego-ing with customs), who then directed me to customs. From there I started digging around and found their table for determining the CIF, which they claimed was a international standard for charging the freight (though I wasn't able to find anything to that extent)