Answer:
The buyer doesn’t want it, the producer doesn’t need it and the user doesn’t know their using it.
What is full of holes but still holds water?
What ends in E, starts with E and has a letter inside it?
How can the letters OWONDER be rearranged to make one word?
What do people spend a lot of money on every year but never want to use it?
What is always coming but never arrives?