The perk machines are only ever used in 2 situations.
1. A new user has no idea what they do so wants to try it.
2. Someone accidentally buys one when trying to identify a body.
No one is actually buying them because they are too expensive and provide such a small effect that people think they don't work.

The perk machines are only ever used in 2 situations. 1. A new user has no idea what they do so wants to try it. 2. Someone accidentally buys one when trying to identify a body. No one is actually buying them because they are too expensive and provide such a small effect that people think they don't work.