10. Princess Diana dress – $125,000
It is one of the best and most unique dresses that were especially designed for Princess Diana. The dress was designed by Catherine Walker who is one of the best fashion designers and is also known for designing over thousand outfits for Princess Diana even the black dress in which Princess Diana was buried was designed by Catherine Walker. Princess Diana wore this dress, which is made of silk chiffon, just two times; one of them was at the London premiere of the opera “Miss Saigon” in 1989 and the other time was at the Cannes Film Festival in 1997. The cost of the dress is estimated to be approximately $125,000.