They didn't have them either, but on display right next to the counter were these:
(artist's recreation: not actual DVDs inside store)
It's a little charge to see your work out in the "real world". Like being in a restaurant and seeing something you've done pop up on TV; seeing something on the "big screen" in the company of strangers, gauging their reactions, hoping for a reaction.
Here's more Little Pim on the little screen:
Collect them all: here.
We're hoping to start up on the next batch of these soon.
In the meantime, I remembered the Staples on Union Square, so we'll be all set with the dry erase markers.