The Singin' in the Rain star netted a fortune from the 2011 auctions, which featured Judy Garland's ruby slippers from the Wizard of Oz and various gowns worn onscreen by Marilyn Monroe - but she insists they were one-off events that won't be repeated.
She tells the Los Angeles Times, "I don't want to do anymore. I was going to do two more, but I'm not going to do it.
"They're exhausting, they're depleting and they're depressing for me and too hard. It goes too deep."
She adds, "I still have a lot of my things but I decided to become rich."