Maybe you can advice about neurosurgery, and in return get what you want. I like about these is that it avoid taxes, and that's always a plus.
"An example of bartering is a plumber exchanging plumbing services for the dental services of a dentist. You must include in gross income in the year of receipt the fair market value of goods or services received from bartering."
Not that anyone does, but if the CRA comes knocking you could be in trouble. :)