I have an offer (not much - couple of bucks, but acceptable) on a philatelic item listed on
ebay, but in the messages, the prospective buyer said, "NO PB."
The only reference I can find on this was not philatelic specific and applied to "No Pitney Bowes" and apparently referred to items not forwarded by the Global Shipping center.
Am I right in thinking he's stipulating that the envelope not be metered? He's in the States, Brooklyn.
I'll message and ask him to clarify, but I was just curious.