The maker doesn't want it the buyer doesn't use it and the user doesn't even see it What is it?

Answer 1

It's a Coffin.

The maker does not want it because he's not dead.

The buyer doesn't need it because he's not dead as well.

And of course the user doesn't no if he's is using it because they are dead.

Answer 2

A coffin. The coffin maker doesn't make it for himself, the person who buys it does not intend to use it himself, and the corpse in the coffin doesn't know it is using it.

Answer 3

COFFIN

Answer 4

coffin