Well yes as far as the price of Shipping goes, we can't change That, what we can change is like you said New & diff. Products, it's a great time to buy from the us and push your products here Locally to! every week I see more and more Canadian Buyers! The younger generation is growing up and they want to shop, buy online.
I strongly believe selling online can only grow, don't know what line your in but the more products you have the better, don't just have one ebay store! have 10 all with a diff. line of Products! The more you put out there the more you will sell "hopefully"
now that all being said, if you soly sell on ebay and your a PS and have a great Score well that's all the better for you, more and more buyers are looking at the reputation of the seller.
Mind you when you have a Hot Product you could have a terrible score and it will sell, but for the average items your Feedback is very important.
Have a good day:)
T.J.