Went to my local tesco earlier and there was a lot of fancy dress outfits reduced in price, some were a better deal than others.
There was the fame outfit (5-6 years only in mine) reduced from £12 to £3. There was also tinkerbell dresses reduced from £12 to £9, cinderella dresses also reduced from £12 to £9. There were also 2 types of snow white dresses, one lot for older girls reduced from £14 to £4 and smaller ones reduced from £12 to £6.
I got a snow white one to put away for Christmas for my youngest!
Not sure if its online too, but these were all in the Stairfoot, Barnsley store.