Starting this thread in the selfish hope that some comic seller's on these boards will opt-out of eBay's ridiculous Global Shipping Program, because I'm missing out on some of my most wanted books because of the program!
The program charges international buyers twice for shipping (once from the seller to eBay's international distribution centre, and once from the distribution centre to the buyer), on top of ridiculous "handling" and "brokerage" fees, before finally assessing actual customs charges.
Other Canadian and international buyers I know have given up on buying from US seller's entirely, because the price of any purchase is increased anywhere from 10-20% by the program's fees.
Fyi for USA sellers shipping to Canada - Canadians prefer direct shipping via USPS. UPS, FedEx, and other commercial carriers charge Canadians flat "brokerage fees" on top of assessed customs (I've paid $50 of brokerage fees on $3 of customs and duty).
USPS and Canada Post have an agreement whereby no brokerage fees are charged, the buyer only pays the actual duty.
I know international shipping can be a pain - filling out customs declarations, and dealing with ignorant buyers who don't understand they need to pay duty on international purchases - but US eBay sellers who use the Global Shipping Program are essentially cutting themselves off from the international market simply to avoid these minor hassles.
Anyways, rant over!