The seller has 1169 feedback and very few negatives, so I doubt that he would actually be a scammer. Blizzard emplyees would most likely not have time to get a feedback like that on Ebay anyway.

Of course, they have connections, and GFraizer already did something like this before.

"Stephen Wolfram is the creator of Mathematica and is widely regarded as the most important innovator in scientific and technical computing today." - Stephen Wolfram