Sell Prom Dress, Size 8

I`m trying to sell my prom dress. It`s been worn once last year. It is a size 8 Alyce Designs dress that was $320 brand new. It is a black fade to green beaded dress (style #6884). Google "Alyce designs 6884" and you`ll see a pic. It is beautiful! I would like to get $175 for it, but will consider offers. I would like to sell this as soon as possible so that I can use the money towards another dress. I will ship within th US.