Can anyone confirm if the book is the same no matter what country it was given away in?
Here's a BIN on eBay for a complete copy of the original Japanese edition: http://cgi.ebay.com/Dracula-X-Noctur...item2a0da7f51c
If the book indeed has no variations, I wouldn't expect much more than half of that seller's price. Asking prices aren't usually good to go off of, but this one looks to be close considering the higher-priced copies that never seem to leave.
Can you prove he's wrong? Can you prove that book is worth more than $20?