For the procedure importing used cars I have no idea. You will need to check with the Canadian authority.
For $7k difference, you might want to get a brand new one.
The States have Lemon law; we do not in Ontario yet. Alberta has just passed the legislation that is what I heard on the news. If you find one vehicle worth considering, you can request its identity to verify if it was stolen, involved in any major accident/s, flood, or it was ever declared Lemon etc. By the way, do NOT buy a Lemon.