This raises a major red flag for me! I believe you are getting scammed! No sane person would sell a cinnamon ghost or even a cinnamon het ghost for $30.
Go to this link for pics of a Cinnamon Ghost.
http://www.worldofballpythons.com/morphs/cinnamon-hypo/
AKedit: Beaten to it. Yeah, it is probably a dark normal the person is trying to pawn off as something special. It also might be in shed. I've heard of people trying to pass off balls in shed as hypo/ghosts.