Niche market book.
This book has been semi-hot for years. Its a cool book. Typically brings $15-30 in decent shape, and there are always random buy it nows in the $50-100 range ( as collectors in this new era tend not to shop around like they should )
The problem I have always had with books like this, or any preview, is this question:
It is really the first depiction of said character?
I have found more often than not, that the first preview/ad whatever, is many times found to be wrong later on, there is something earlier. These previews and ads are MUCH harder to research than regular comic issues.
I wouldn't pay near $100 for a book like this. I'm not the only one, that's why I said it's a niche book.