Henry's from Canada into U.S - Any duty fee ?

I live in Canada and have purchased many times from US ebay sellers and camera stores. With the Canada US free trade agreement you will not be duty on cameras (electronics) but will be charged sales tax depending on where you live. When I purchase from the US I get charged provincial sale tax and Goods and Services tax which amounts to about 14%. I would be charged the same if I purchased the item in Canada. Canada Post and USPS will not charge you brokerage fees.