He said old Hollywood memorabilia is particularly sought after by baby boomers with money and feelings of nostalgia.

Prices, too, are rising, he said.

"Oz" props are particularly collectible because of the movie's longevity and status as a pop culture icon. Maddalena recently sold a "Cowardly Lion" costume for $805,000.

But there are many other pop culture items in the auction including a BatSuit from 1995's "Batman Forever" and an alien creature costume from 1979's "Alien."

And never fear "Superman" fans, the auction features many memorabilia items from the 1978 movie such as transcripts from "brainstorming" sessions by the film's participants, including Marlon Brando, that can be bought for less than the costumes, Maddalena said.

Overall, more than 700 items will be up for sale at ebayliveauctions.com or profilesinhistory.com

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