Are you talking about G1 Shockwave? If so, there's a guide on how to tell the fake from the original here.

Quote Originally Posted by Bidoofdude View Post
EDIT- Someone just bought it. I have a feeling it was soemone on here.
I don't even have an eBay account, so don't look at me! Besides, if it's a fake then just as well you didn't get it.