Wow!  And right in your area.  Sounds like a steal to me….and I mean that in two senses of the word!  It looks real to me, but if it is real it may be stolen property or illegally obtained if it's only $100.  If I were you I might buy it and then contact some international board on stolen artifacts.  Make sure to get contact information and a description of the seller.  You could probably learn some neat things along the way.