A black velvet dress belonging to the star and jewellery she donned in the 1992 hit movie will be sold to the highest bidder at the Hollywood Legends auction on 31 March.
Julien's Auctions boss Darren Julien has defended his decision to include the items in his long-planned sale so soon after Houston's death.
He insists the memorabilia is "part of history" following her passing.
He tells the Associated Press, "It proves a point that these items, they're an investment. You buy items just like a stock. Buy at the right time and sell at the right time, and they just increase in value.
"It's a celebration of her life. If you hide these things in fear that you're going to offend someone - her life is to be celebrated. These items are historic now that she passed. They become a part of history. They should be in museums. She's lived a life and had a career that nobody else has ever had.
"For people who are fans of Whitney Houston and never would have had a chance to meet her and never got to talk to her, these are items that literally touched a part of her life. They are a way to relate to her or be a part of her life without having known her."
The I Will Always Love You hitmaker was found dead in the bathroom of her Los Angeles hotel suite on 11 February and she was laid to rest in her native New Jersey over the weekend.