The previous replies are accurate. There are duties (probably zero as researched by electrik), sales taxes (HST), and a brokerage charge levied by the carrier to process paperwork, where postal mail is the only reasonable choice.
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MEC is really increasing their offerings of bicycle parts. The Toronto in-store selection is much larger than can be found on the website. I specifically recall seeing a line of MEC-branded bars (both drop and various flats) and threadless stems that are not currently showing on the website.