the US duty fee to the chanel "leather" bag is 8%.(for leather good). I just bought a jumbo and brought it back and paid 8%
Unfortunately, it's not that simple (much like any US Taxes LOL). US Customs Tax on leather goods/handbags (it varies for other items) is more along the lines of:
i) the first $800 for singles/$1600 four couples is exempt,
ii) the next $1,000 is taxed at a lower rate of 3%, and
iii) anything above that is taxed at the full rate of 6.5%.
Also, the amount you declare should be less the VAT refund (so that helps a little).