I recently ordered a set of 17" Nissan Pathfinder aluminum wheel's off of ebay, they worked out to $125cdn a wheel with shipping. However I had the wheels shipped to my friends place in Washington state.
There are two problems when ordering wheels off of ebay.
1. most of the sellers won't ship to Canada
2. Some will but the shipping will be a minimum of $200usd, with lots of bokerages fee's and duties. I investigated this and it would have been at least $100cdn of bokerage and duties and taxes.
I would highly recommend a seller on ebay named: irol1984, he will ship to Canada for $200usd. There were a couple of other sellers but was a bit leary after reading some of there reviews.
If your just looking to 17" steelies, try Kal-tire or www.tiretrends.com