Styrofoam pocket trays? Never in my life have I seen 209 primers or any othe primer in a styrofoam pocket tray. They routinely come packaged 100 to a box in plastic each in a little cell in the package that is about 3 inches by 3 inches.
They are now, but I was given the reloading inventory of a co-worker's father who died, and there were old rifle primers just loaded full up in a square plain cardboard box.
I only buy CCI, so I do not know about how the other brands are packed.