Question
Many sites such as Jigsaw, Lead 411, and others charge a monthly fee. Also, LI InMail can be expensive.
Answer
That depends on what you're trying to do. If its just to spam them, then buy a list. If its to actually speak with them, sign up on Linkedin or something similar (though Linkedin is the oldest and biggest of these professional networkign sites) and reach out to them or those near them.
