Can you see a situation in which you'd pay the extreme price point of $100? Let us know in the comments.
In relative terms, if you need to have a letter/document/parcel sent quickly to someone on the other side of the planet, then I'd say a hundred dollars is about an average price DHL or Fedex would charge you; it's certainly not extreme.
I, personally, wouldn't pay $100 for a one-way e-mail. However, if the price entailed a reply, then I'd be ready to pay even more for such an option. To ask some guru a question, why not? Warren Baffett charges like half a million for a chance to have a lunch with him.