I went through dhgate with mine and used seller fionavogue. If you want to see pictures, look at the post that says something about knock-off dresses.
I was completely unsure about dhgate until a student of mine told me she bought her prom dress on there (it was a poofy ballgown) and with through seller aokstart. I looked up the pic, and then I told her to see me when I chaperoned prom.
Sure enough, the dress looked as advertised. I think it's just hit and miss since you're dealing with different sellers.