And then there was someone who claimed $150 per box (10) - 8331 - but offered them
for free to anyone who could use them (Posted 9/6/2011);
obviously it was $150 for 3 boxes, but still a very nice gesture.
There is one website which shows prices in either CDN or US $.
Prices almost double when you checkmark Canadian.
So make sure you compare before you buy.
In any case it pays to shop around.