The bushfires have destroyed thousands of homes and left 24 people dead.
All funds raised by the auction will be donated to the Australian Red Cross Disaster Relief and Recovery Fund.
Warne added:"Everyone is in this together and we continue to find ways to contribute and help on a daily basis."Several other famous Australians have been raising money to help those affected, with tennis star Nick Kyrgios, actress Nicole Kidman and singer Keith Urban among those who have pledged funds.
Comedian Celeste Barber has amassed more than A$28m for the New South Wales Rural Fire Service after launching a fundraiser, with her millions of social media followers contributing to the huge total.where he won an awardStars from other parts of the world have also donated to support the fire services battling the flames, including the US pop stars Selena Gomez and Pink - the latter has pledged $500,000 .
Bradman played for Australia from 1928 to 1948 and is widely considered to be the best batsman of all time.
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