Sherri Hill #54929 Prom Dress.  Size 6, emerald green satin.  Worn once and no alternations were made.  Minor wear.  In good condition.

You can see the dress as modeled by Sherri Hill (shown in red, dress being sold is emerald green)
https://www.sherrihill.com/style-54929/54929.html

Originally purchased for $600.