I think/hope eBay is on the right track with this.
I live in a wee village and our local PO has all the stacks of parcels that have arrived, everything from boxes of stuff to car bumpers!!!
As an eBay seller, it is so sad to see so many "Amazon" labelled boxes in the stacks of parcels arriving.
This is basically free advertising for Amazon, everyone who comes to the counter sees that folks in their neighborhood are happily buying stuff from Amazon.
I think in the last year I've seen one parcel that had eBay logos on it, yet I know there is lots of stuff eBay sourced in those stacks too.
I'm hoping that the eBay supplies are competitive and that they help market the fact that the item is eBay sourced.....
Time will tell....