[sb1]

The benefit to US sellers is that they only pay postage to the US based mailing center which is normal postage rates. While mailing from Canada to the US is relatively cheap, mailing from the US to Canada is pretty expensive, even for a small package so the ebay sellers benefit from very little out of pocket and none of the risk of non-tracking as well, as ebay is on the hook if something goes missing. Added, I buy a lot from Canadian sellers and pay low shipping, just have to endure the wait, which is not a big deal.