Had it been located in Montreal, I would have drove it for you.
US Citizens are allowed to return with $200/month value of purchased goods for personal use, getting it out.
And we are allowed to bring $60 in gifts in to Canada.
If they hassle you, you can protect yourself by filing a declaration that the item will exit with you and they can't tax it. (of course you should be telling the US customs officer that you are returning with said item.)

More details:
http://www.dutyfreeexpress.com/forms.cfm

The US/Canada border crossing customs is highway robbery. Canadian customs have taken me for $300 so far on 'gifts' for Canadians. And they search my car each time. A 30% tax!