Sell My Wedding Dress is featured as a top tip on MoneySaving Expert.com’s wedding feature:
Top second-hand wedding dress sites
Second-hand dress sites offer glam gowns for a fraction of the RRP. MoneySavers' three top sites to try are SellMyWeddingDress, Preloved and Confetti's for-sale section. Other good bets are The Dressmarket, Gumtree and, of course, eBay* (see eBay Buying Tips and the Local eBay Deals Finder).
Some MoneySavers even try on dresses in shops, pick their favourite design, then look online to see if they can find a secondhand version to grab it for less. But to be fair to the shop, try to minimise the amount of their time you use if you're going to buy it cheaper elsewhere. And why not give them a chance to offer you a discount? Do it right and you could grab a film star number for a fraction of the cost, like forumite laura_hoggle did:
I tried on dresses in a shop and found one I loved. I was really lucky to find someone selling the exact same dress in my size on SellMyWeddingDress.
I would have been happy to wear a second-hand dress, but this was brand new, unaltered, tags still on – the woman selling it didn't end up getting married. It was advertised at £400, but she said she was open to offers, and accepted £350 straightaway.