Yves Saint Laurent Black Opium

This is the Yves Saint Laurent Black Opium Eau de Parfum. It’s 90 ml and retails for $210 + tax I’ve only used it twice so it’s full, and I am looking to sell it to someone who will make use of it. Not sure how to verify the authenticity as I don’t have the box, but I purchased this at the Eaton Centre Sephora within the last year.