Depending on who is shipping it, customs will either be:
USPS: Tax rate of your province
Fedex: Tax rate of your province + a small brokerage fee (iirc $5)
UPS: Tax rate of your province + a huge brokerage fee if you use ground ($44.25 if it is between 200 and 350. If it's between 350 and 500, it's $49.70)
For example, if you use UPS, and you live in BC, and you get the 87u, then it's $345 + shipping from EKB, + (345*12%)=$41.40 in tax, plus $44.25 brokerage fee = $430.65 plus shipping (iirc, $30)