> When you print a shipping label on eBay, our negotiated rates let you save money relative to what you would pay at the post office or to a carrier for most services, and you'll save time by not having to stand in line. The cost of the label is then charged to your invoice, PayPal account, or Processing funds if you're a managed payments seller.

Source: https://www.ebay.com/help/selling/shipping-items/labels-pack...