Unknown Character?
Well, the sketch cards that I did for the DC Legacy set have started turning up on ebay, though the person who listed the first of my cards doesn't appear to know his DC history very well. "Unknown character" indeed. Granted the Atom only wore that costume briefly, during his tenure as a Teen Titan, but still... it's not THAT different from his standard costume. Not so different that I wouldn't be unable to ID him anyway.
That's so cool, you're ebay-able!
And I would've known right away it was the atom!