Is this a Knock Off? (post here for help)

[Megatron]

I need some help please! I'm looking at making another big purchase for a MISB G1 figure BUT I'm scared that if I post the link/source info here someone else may grab it! So... if you are an expert on identifying genuine G1 originals and can help confirm that the item is indeed genuine (or a KO), please PM me! I only have a few days on this.

Edit: Thanks very much to those who PMed me. I think I've got my answer now.