While researching an article on the cost of Christmas cards, I called Arvey paper to check prices there. I have a box of blank cards that I wanted to price, but apparently that brand has been discontinued. So I asked the saleslady to find any box of white cards, describe it, and tell me the price. It took her a few minutes to understand what I was asking for (she kept saying "Do you want this kind or this kind?), but eventually she got one for me. The result: a box of 100 pearl-bordered panel cards with an inset panel for $15.99.
Now I know.