We don't handle a direct integration with Ebay, but if the orders are imported into Shopify, we'll be able to do the shipping for you using Canada Post, FedEx, or UPS. To sync your Shopify store with Ebay, start with Shopify's official app,Marketplace Connect, and use their live chat to ask how to sync your shipping rates over. They have a great support team working on live chat, round the clock.