Hello 'yvonne',
What exactly do you mean by "can't"? What country is that in? Have you contacted the
seller to ask if she will ship to you?
If it is an ordinary item but the seller does not usually ship to Canada, and if the seller is
willing to sell to you anyway, as 'toby' says you can have the seller add your name to an
exemption list thus enabling you to buy. This is how ebay Canada explains it:
http://pages.ebay.ca/help/sell/buyer-requirements.html#exemption
If, however, it is something which ought not to be imported into the country, as 'femme' says
it will not likely get past Customs Canada and you will end up with no item and no money.
Customs officials make no apologies.
So when doing a Search, from the left side of the page under Location, if you were to choose
Canada only you could solve the whole problem.
Just a thought 
