use Auctiva, which will insure Cdn. eBay sellers. You can pick and choose which items you insure, even after a sale (within a time limit).
4) There are third party insurers available, but I haven't used them
Rose, If you've insured through Auctiva than you are using a third party insurance company. Auctiva uses Shipsurance which is a third party insurance company. Actually I think that it is cheaper to buy insurance directly on the Shipsurance site however it is a bit more work too.