Re:
Not quite Canada, but I think it was upstate New York, I had a heavy steel frameset sent over (frame, forks, stem, BB, plus cantis) using USPS and the shipping cost was about £130. Customs was just over £30.
I had a similar package sent over from LA, less forks but again using USPS and the shipping cost was about £80, with customs just over £40 (?).
I was once quoted $539 by the seller for the shipping of a complete bike from Boulder - and that bike is still for sale - I just think the seller didn't want to send to the UK!
I would therefore expect 'reasonable' postage to be around $200 + c.20% for customs charge.