Answer:
The buyer doesn’t want it, the producer doesn’t need it and the user doesn’t know their using it.
What heavy seven letter word can you take two away from and be left with eight?
It weighs next to nothing but no one can hold it for long. What is it?
What stays in one corner but travels around the world?
What two letters in the alphabet say goodbye?
If it’s information you seek, come and see me. If it’s pairs of letters you need, I have consecutively three. What am I?