Posted By:
runscottAAA (Libertyforall) and NASA have taken a legitimate term and abused it.
"paper stock" is a self-descriptive term. If a card is on paper-stock it should be easy to deduce what you are dealing with. And as Julie said, it's a very useful term when dealing with ANY printed item, not just cards.
take-home lesson: filter "AAA" and "NASA" out of all your ebay searches.