Poncher told the Los Angeles Times that she hoped to raise enough money to pay off the $1.6 million mortgage on her Beverly Hills home.
"I can't be more honest than that," she told the newspaper. "I want to leave it free and clear for my kids."
The Westwood Village Memorial Park is home to many celebrities, including Dean Martin, James Coburn, Roy Orbison, Truman Capote, Natalie Wood, and, from this year, Farrah Fawcett.
Elsie Poncher said she would move her husband's remains over one spot into a crypt intended as her final resting place if the sale was successful and she would be cremated instead when the time came.