Margaret Thatcher's death could propel the Wizard Of Oz song Ding Dong! The Witch Is Dead to the top of the charts.
It reached No 9 in the iTunes chart yesterday after it was downloaded by people who saw her death as a cause for celebration.
The most popular version of the song, by Judy Garland, made it to No 54 in the official charts in less than 12 hours, failing to make the Top 40.
Fashion outlets have also been quick to cash in.
One online store was selling T-shirts featuring a portrait of the politician with the word "Dead" beneath.
The funeral service next Wednesday will be held at St Paul's Cathedral, and is expected to be attended by a number of dignitaries from around the world.
Buckingham Palace has announced that the Queen is to show her respect for Baroness Thatcher by attending the former prime minister's funeral.
It will be the first time the Queen has attended the funeral of one of her prime ministers since Sir Winston Churchill died in 1965.
Lady Thatcher indicated she did not want the state event Churchill was granted, but will receive full military honours – the same status accorded the Queen Mother and Diana, Princess of Wales.