dose any one know any sites where i can get like gothic ball room dresses or like really fance gothic dresses?

Answer 1

http://www.sf-lilith.com/favorite_links.html has some good listings, but here are some I know and love:
http://www.dracinabox.com/
http://www.fairygothmother.co.uk/
http://www.jeannienitro.com/
http://www.kambriel.com/
http://www.rosemortem.com/
http://www.thedarkangel.co.uk/
http://www.velvetgarden.net/
http://www.galleryserpentine.com/
http://www.mortishas.com.au/
http://www.yosa.com/

Answer 2

It looks like the following sites have some good stuff. The only place I have seen dresses like this in a store was in New Orleans; voodoo and things like that are big there so they have a lot of dark stores. Well they did before Katrina anyway, haven't been there is a LONG time. I LOVE this one:

http://www.fairygothmother.com/ct-01.htm

The second site I listed below has some cool ones like Dita Von Teese might wear. I also suggest getting some ideas and sewing up your own. You can always buy a normal gown and buy fabric you might want to add (black lace, etc) to it and have your own unique peice.