I used Cinderella bridal shop on ebay when I bought my wedding dress. The customer service was quick to respond and super nice. They're from China which is where all wedding dresses come from nowadays anyways! I won my auction for pretty cheap and with shipping my dress was $150. If you'd like to see pictures of it...you can go to this site
They can custom make a dress for a couple hundred bucks. It was still WAY cheaper to buy here for me then have it altered later on. I received so many compliments on my dress. Good luck with your search!
I've had a couple of my brides buy their dresses on ebay with great success. The only thing you'll need to check is the sizing. Make sure their measurements match yours since a woman who normally wears a size 8 might need to order a dress anywhere from size 4 - 12! Here's a dress from one of my e-bay brides! Marci Curtis - Wedding Photojournalist www.marcicurtis.com
Click on each tool to see a sample.