http://booksbxfx6ciebutmfvorkotgfbwcwp24qpcxyuyen355z4eknxbzuqd.onion/dark/Laden_Kash_-_The_Dark_Web_%C2%B7_Exploration_Of_The_Deep_Web/THE_DARK_WEB_2.html
Normally it seems to be of those who themselves have misused the dark web in one way or another. I've seen bank account details, personal addresses, phone numbers, social network account with passwords, everything - http://npieqpvpjhrmdchg.onion This is why I would suggest you browse the dark web, rather than actively participate in it.