Through various things I've done in my life, I've collected a lot of Excel Contact sheets. Most of them are for Lawyers, Chiropractors, and Politicians. They are all very organized and contain names, company name, phone, address, email, websites.

They are all very specialized lists (i.e. Lawyers in a certain area that practice a certain kind of law).

I'm new to the Black Hat world, so I have no idea how much, if any at all, these could sell for.

Can anyone please enlighten me?