I think this dress is just lovely! As Sue said, Laroache suffers a bit of an image problem, due to all the licensing agreements I suppose. If you eBay it, I'd put a reserve on it and put the word "Couture" in the title. Show the label and the couture number in your pictures.
And speaking of labels, would you like to contribute a picture of this label to the label resource?
Thanks!
Lizzie