Wedding Dress Crisis. Help Please!!

Does anybody know of any good places or sites to sell a brand new wedding dress? Needs to be credible and someplace that won't rip me off. I was going to be getting married this August (2017) but decided I'm too young and I want to finish school and I'm not ready to settle down yet. I love my dress so much and it's absolutely perfect to me.. I hate having to get rid of it but school is more important to me right now after that relationship and due to the fact that I won't be able to work as much once I start my clinicals, the extra money would be a semester I wouldn't have to stress over money wise. Any suggestions would be greatly appreciated! As I am drawing a blank..