My guess is that it is the "Ghost in a jar" that never sold on E-bay years ago that has been placed in a box.
While it would be paranormal, the sheer terror of owning a real ghost would make it worthwhile. This would be a great companion for the human skull that I just received, I would be able to offer the ghost another place to hang out.

I was going to use my ghost hunting equipment (www.rockymountainparanormal.com) but that would not be fair to others.

Maybe I will just get the I heart the Yeti shirt and pretend I am a cryptozoologist instead.