Then it's "not serial numbered" not "unnumbered" - big difference.
Looks like it missed a step in the printing process, or it was an overrun that was backdoored (overruns were held onto by the manufacturers for replacements for damaged cards). It cannot be listed separately from the listed card.
-- Dan --
Note: Please see my profile for more info regarding trading (section updated 3/4/2024). I have added a large portion of my inventory to the site, and currently have trading turned on (details are in my profile).