Depends. In general, all merchandises purchased from across border are subject to taxes and duties, unless the value claimed is under $20 CAD or claimed as gift worth less than $60. There are certain conditions for the item to be claimed as gift however.
There's one way, ask someone you know who lives in USA to bring it over for you! I did it once for a quite bulky and expensive item, no duties at all! another big plus: some items ship free to US destinations!