I almost never buy from Amazon.ca (Canada) because the selection of items is so limited.
Amazon.com (USA) is far, far better. (Some of my purchases get held up at the border, though. Most get through.)
The Canadian service has just added electronics. Strangely, you cannot buy Apple products, but you can get a Zune.

Always check the price at Amazon before buying anywhere else.
Steve Jobs is fond of saying, “Do you even know anyone who owns a Zune?”
I do. My buddy Andy. He works for Microsoft.