Joan, I've got a size 10 Demetrios gown that I'm looking to sell for $300 (included in that would be the detachable train and matching shoulder wrap). It's white, strapless, and quasi-ballgown style. The style # is 2530 under the Young Sophisticates category on the Demetrios site. If you're interested, please e-mail me at:
Lavandulachaix@aol.com
In addition, to match, there's a matching pearl tiara-style headpiece, full-length veil with blusher, white size 8 mule heels, and a petticoat.
Look on my site at http://impressivedesigns.freewebspace.com and look at the dresses that I have I have a lot of styles that will fit in your budget. Most dresses are in stock, so no long delay on shipping. I also have an informal sheath style dress that is a size 12 that I'm selling for $150. Let me know if I can help you.