It's not just guns and drugs that are up for sale on deep web sites.
Vendors also list guides on how to commit other illegal activities.
The author claims that someone who operates the scam can earn up to $15,000 (£9,700) every month if they operate the dating scam full-time.
Here's the overview of Adhrann's scamming guide: Adhrann advises people following his guide to take care in the way they set up their dating site profile.
They should have a burner phone, he says (a disposable phone that can be used for temporary tasks and then discarded).
If you've used a dating site or app like Ok Cupid or Tinder, you'll have noticed the hundreds of fake profiles that exist on the sites, seemingly designed to make you hand over your profile to scammers.
Dating sites are, thankfully, getting better at spotting who is using their service to send thousands of spam messages.
It's pretty easy to tell: They send the same message over and over, often with the same link.
But there's a type of dating site scam that's far trickier to spot, and the people who operate it claim to be making thousands of dollars every month fooling vulnerable men.
Business Insider obtained a PDF guide that is sold online for just £2.59.
It details how scammers operate fake dating site profiles in order to con men out of money.