Marilyn Monroe in an undated file photo (UPI Photo Files)

The New York Daily News said the items, which include 47 minutes of previously unviewed, behind-the-scenes footage of Monroe and Clark Gable filming "The Misfits," are to be sold through Julien's Auctions this weekend.

Clothing, furniture and previously unseen documents related to the actress were also auctioned off at a Bonhams and Butterfields' sale in Los Angeles Monday.

Monroe died of a drug overdose in 1962 at the age of 36.

Darren Julien, head of Julien's Auctions, said Monroe is No. 1 when it comes to the saleability of celebrities.

"She's the top. Elvis is comparable, but there are some things of Marilyn's that just go over the top," Julien told the News. "About a year ago, we had a Monroe umbrella that we estimated at $10,000 to $20,000, and people said, 'You're never going to sell it; it's just an umbrella.' It went for $49,000. ... She's larger than life, yet people identify with her. She seemed very human and had such a tragic life."