Per this announcement: Effective September 16, 2024, USPS will increase rates for package delivery to select zip codes. Although this increase affects a very low percentage of transactions on ebay.com, you may see a higher shipping label cost for some locations. The increase is for weight-based and cubic packages up to 20 lbs. for Priority Mail, Priority Mail Flat Rate, and Ground Advantage delivery to these zip codes. The eBay shipping calculator will automatically...

A few entries into the eBay shipping calc and we can see how this is working.Shipping from any zip code to affected zip codes we are seeing USPS published commercial rates.Shipping from affected zip codes to non-affected zip codes we are seeing the deeper merchant rates negotiated between USPS and eBay (that answers the question I asked @kyle@ebay upthread).Shipping from any zip code to non-affected zip codes we are seeing the deeper merchant rates negotiated between USPS and eBay.&nbs...

USPS Rate Increase (Sept 16 2024) - based on zip codes, not zones | Shipping

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USPS Rate Increase (Sept 16 2024) - based on zip codes, not zones | Shipping | eBay Community