That sounds like the classic case of Print Run (PR) vs Serial Numbering (SN). Basically, if I'm barking up the right tree, an appropriate note would be PR250, to denote that there are 250 of it, but they aren't serial numbered (1, 2, 3, etc.). I hope that makes sense, and perhaps another site member could verify that as well.
I'll never quit collecting entirely, but I am downsizing. Check out my COMC store and help me thin out what I don't want so I can buy cards that I do want. See something you like? Send me a message on here, and we can knock the price down quite a bit. I'll even take a bit of a loss if it means getting you a card you really want.