From eBay.com – January 4, 2018
The Good News: eBay Has Negotiated Lower Rates for Sellers
eBay has been able to negotiate with the USPS on behalf of sellers and secure a significant discount for eBay labels. While this still means a slight increase in the average cost of shipping an item using USPS, sellers who use eBay labels can save up to 25% on First Class Package Service and up to 24% on Priority Mail*. Plus, tracking is automatically uploaded, so you can print a shipping label from anywhere. You can even schedule free pick-ups.
*Compared to USPS retail rates. Negotiated Commercial Plus pricing is available via eBay Labels to all eBay Top-rated sellers and sellers with an average of 300 or more transactions per month.
Read the entire announcement here: https://community.ebay.com/t5/Announcements/USPS-Shipping-Rates-are-Changing-and-eBay-Has-Negotiated/ba-p/27939005