I was just reading a topic on the Becket boards about Insurance. I don't know if this is true but here's the quote.
"I guess a lot of people on here do not pay attention to the fine print when they ship via ExpressPost. Everybody is stating that the package is insured for $100 when you ship ExpressPost. That's correct.
HOWEVER......
the fine print states that you are not allowed to ship comercial goods via ExpressPost. ExpressPost is only supposed to be used for paper documents and the like. Sportscards are classified as commercial goods, and CP will not cover them. The seller is right. There is nothing Canada Post will do in this instance..... you will not get any money back from them, and all you can do is cross your fingers and hope there is something Visa can/will do. Good luck."
http://www.beckett.com/beckettforum/Default.aspx?g=posts&t=1478893