I don't have mine yet, but the one I'm drooling over is on sale for $150. But that's super simple and more of a sundress-y style than something elegant. Your budget should be just fine! There's plenty out there if you look around.
Honestly my dress was 300 I added extra with alterations and what not which was like 600. My seamstress was a family friend so she may have undercharged me honestly. This is my dress and it was from DB
Mine was on sale for $774 but I got 10% off with military discount so $700. I got the slip to go under it from DB and it was $55 (had $20 off coupon from bridal show)