Do note that 4noggins won't refund you if you choose to send it back. You actually have to click a box to accept their policy. I'd still send it back if the duties are outrageous: as I said before, I'd rather lose the money than to send a message to customs that they can ravage and pillage me whenever they want.
SPC will refund you the amount you pay for the toby, but they won't refund the shipping. Fair and square, I think, since they get back the unopened tins which they can resell as new (which they are). The ones who really lose are the postal services.
Pipes & Cigars don't ship to Canada, methinks due to a high number of returns due to BS duties. I wish they reconsider and adopted a policy like 4noggins': "if you return it we won't refund you a dime"; as I said, if the duties are reasonable, I'm not opposed to paying them. I once ordered 150 gr from SPC and got dinged with about $35 CAD: I paid them. Next time, for the same amount, they wanted to charge me about $119 CAD in duties: I sent it back.