One of the lots I purchased had three figures. Two were classic RT-era mercenaries. The third was this chap:
As far as I can tell it's not a Citadel figure. He is a mutant of some kind, with a third eye in the middle of his forehead. His pistol is a multi-barrel "pepperpot." He has "Three Eyes" on the front of his tab and "I.P.C. 1985" on the reverse. Any help in identifying this figure is appreciated.
Dom Skelton on The Miniatures Page figured it out for me. Evidently, this dude is a Judge Dredd mutant. So, Citadel, but not 40K. See here:
How about that? So, should I sell him on or keep him for the Helsreach project?