weve tried to sell ours on ebay/gumtree a few times and no luck, quite disappointing as the outfit cost well over a grand!
One tip, dont use the images from the designers/labels website, ours kept getting taken down as soem petty person wouldnt let us use the stock images and kept reporting us for copyright. Quite shite if youve paid so much money and they the same person wants to scunner you getting some of your money back. Wifey didnt want to use images of her i the dress either.
Would also be interested to know about bridal shops acting as agents, wonder how much cut they would take?