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.

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Another way to spot whether an account is fake is the selection of photos that it uses.

Adhrann's guide says that scammers should "look on the Internet for a bunch of pics of a cute girl" and select someone who is "not a top model, but a normal sexy girl." To find photos, scammers can buy sets of photographs of young women, often through shady forums frequented by hackers.

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.

They are then instructed to take the information learned, and then create the "perfect woman" for the target.

Adhrann says that scammers should "emphasize on you being in a difficult financial situation, yet DO NOT insist on that, but treat this subject like you have been much better in the past, and really ashamed now, [as you are] not used to being poor." Step three is where things start getting really interesting.The guide isn't available for free, in fact, it was being sold for Bitcoins on a deep web marketplace.Bitcoin is cryptographic currency favoured by criminals as it allows semi-anonymous online transactions.The author claims that someone who operates the scam can earn up to ,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.This screenshot shows a user of a hacker forum being advised that a quick way to find sets of photos is to automatically download them from Facebook: Even before a scammer messages you, you can spot they're fake by checking their photos.