I have tried to work with sellers to avoid the GSP. We have been
unsuccessful every time. My understanding is that, once the seller has
chosen the GSP, he is locked in. That is what sellers have told me.
Sorry, but in spite of the policy you mentioned, I have yet to have any
surcharge placed on any item of any value by the gov't of Canada on a
USPS shipment.I am one of those who will avoid EVERY seller who chooses
to ship using the GSP