Just as an update - I placed a smallish order today for about $230 US, and Keh indicated that they won't ship anything over $50 via USPS to Canada. They want the package to be fully insured, and trackable. Also, they have to make a special trip to the Post office to do the shipping, and for a company that does a *lot* of mail order, that would be a pain. Understandable.
They're prices are quite good, so I really don't mind paying the extra for shipping.
Come-ing or going to canada its best you use air mail its faster and less expensive , I all ways use USPS priority mail service have sent to canada and england and have had no problems Yet: