Speaking as somebody who does this...haha...it depends how it's listed...if it's a Buy-it-now auction, it's only .50 cents, so it's not an issue.
I don't like shipping internationally, but if the buyer will pay the fee and accept that it might get bumped in transit, I'll usually be okay with it. I just sent something to the Netherlands and it was $55....I feel bad asking for so much, but it's gotta be that way.
I'm surprised Canada would be a hassle...but who knows what problems the seller has had in the past.