Shopbop.com may be your place. The majority of the dresses in their Wedding Boutique are under $1500. I was very surprised by that little fact. Also, their boutique carries names like Marchesa, Thread, Alice + Olivia, Ports 1961, and more for such amazing prices.
Here are few additional options under $1500:
Vendor of the Week – Nathan Kaso Weddings
4 hours ago