For your information, that particular item is a rare prototype unit of only 5 were made. You can tell by the graphics on the plastics.
Any dyed in the wool collector would know the difference.
Congrats on the excellent find, but my advice next time is to keep it to yourself to avoid any unwanted attention.
I would be surprised that $120 was a ploy to get more money for it, as I am sure it will go for much more.
I would just forget about it, and make do with a cheap knockoff from Target.