Not sure I understand. Are you saying you are the author of a new book, you haven't sold any copies yet, you created a listing for your book and people are offering to sell it as a collectible (presumably as an arbitrage where they'd fulfill on your book)?
Or did you create a new listing for someone else's book, that others might credibly own already?
Or did you create a new listing for someone else's book, that others might credibly own already?