Badgley Mischka Navy Blue Dress

Simple yet unique designer navy blue mock neck like and knee length (on me, I am 5'5) dress. There is a zipper up the side and four buttons on the front that form a rectangle, and there are no sleeves. I received it as a gift and was told it was vintage however I've never worn it. It is polyester and viscose. I'm not quite sure what the original pricing was, but I've done a lot of research on similar Badgley Mischka dresses and I believe I have made a reasonable estimate of its worth.