Another option for deciding your shipping charges is to use the shipping calculator when you list an item. This will usually mean that your buyer may have to pay a fair bit to have the item shipped to them, but if you have a quality item they will probably be willing to pay it. The calculator was only offered in the US at one point, but I believe it’s now available to Canadians as well. This video I found will explain the process to you. Let me know if you try it.