How much is a Star Wars poster with Leonardo Dicaprio as Anakin worth? just wondering.?

I found an official looking promo mounted poster with other glossy photos from the movie. The funny thing is that it is actually Leonardo Dicaprio pictured as Anakin. I know he turned the role down but I was wondering if any promo pictures were made. If so, how many and what might it be worth. Wont be selling but will need to insure.