It's hard to swallow, when you end up buying something a bit overly enthusiastic only to find out that you did not buy what you expected.
I guess we've all been there a couple of times, one way or another. I know I have.
I don't think the seller fooled you on purpose, and I would inform him about it, even if it only serves the purpose of him avoiding such ambiguity in his future offerings. Maybe if you can manage to agree with him that you were both stupid (I apologize to you for putting it so bluntly), you can perhaps reach some kind of gentleman's agreement. Even if it was not deliberate, Ebay policy forbids to sell something that deviates from the description. He said "J.A Hanckels." That razor is not a J.A. Henckels, or "Hanckels" for that matter.

I hope this still works out for you. If not, I hope it 'll be the finest shaver you've ever bought so far.

Good luck,
Bart.