Canada is the 51st state, so don't worry about us. You can even track packages across the border, if you paid for a service with tracking.
I have also shipped to the UK and tracking was trackable from Canada to UK. The only problem there was that it's SLOW to ship to UK, it gets bogged down in customs for a long time, which then makes the customer irate at the total time it takes for their purchase to arrive.
THat's the one thing that irritates me about "the average idiot on ebay". They'll buy something dirt cheap from the opposite side of the planet, like Hong Kong, and then complain in feedback that "it took 3 weeks to arrive!!!" .