Are the 1c to 3c modern definitive panes
Scott 3749 1c Tiffany Lamp
Scott 3753 2c Najavo Necklace
Scott 3754 3c Silver Coffee Pot
readily available at USPS post offices or do post office locations mainly just stock Flag forever stamps.
I notice that on eBay
panes of these stamps sell for more than what you can buy them for on the USPS website including shipping. Same for some of the recent Forever commemoratives. Is this because of convenience and lack of bricks and mortar availability?