Size 18 Wedding Dress - Never Worn

Size 18 Wedding Dress. Never worn, except to try on. Decided against wearing it for my upcoming wedding. This dress has not been altered or hemmed. Bought for $567 including taxes. It is white and very sparkly! There is a slit on one side, a half zipper on the back, and it laces up in the back as well. I am a size 20 in non-wedding sizes and the dress fits snugly - the zipper won't go up about an inch at the top but there is plenty of room in the bust, so it feels like a true size 18. It could be altered to remove the zipper or to have it taken out a bit. I also did not purchase the sleeves - these were just tried on at the boutique.