Craigslist is a website normally known for its cheap second-hand furniture, rooms to rent and job listings.
But some people have taken to the classified advertisements website to sell 'clean' urine and even drugs.
A Liverpool woman posted a listing on Craigslist around one month ago to sell 'golden samples'.
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The description of the listing said the urine was 'totally clean for any testing needs' and 'can be delivered frozen for future use too'.
The 30ml sample was labelled as being in 'new' condition with the make/manufacturer being 'mine'.
The Craigslist listing read: "Golden samples for sale - £50 (Liverpool)

"Female liquid gold for sale, totally clean for any testing needs. Can be delivered frozen for future use too. If you need to pass any kind of test this is the cleanest you will get.
"Do NOT contact me with unsolicited services or offers."
There is no law restricting people from selling their own urine in the UK, but when it's being sold to abet illegal activity the lines get blurred.
One user was also apparently using the site to sell drugs.
A picture on a listing posted on Friday, September 17, referred to "coke, ice weed, pills and shrooms."

The list of drugs apparently being sold was followed by a username for the video conferencing platform, Wickr.
But in an apparent bid to cover their tracks, the poster put his listing title as a 'Bushnell Rangefinder'.
The description, which was used to stop it being flagged to moderators said: "Selling my V5 shift, great condition, have not played golf in a while is why I'm selling."
A listing with the same picture was taken down by Craigslist just two days before.
Merseyside Police said it was aware of drugs being advertised for sale online.
A spokesperson from the force said: “We are aware of illegal drugs advertised for sale online and will take the appropriate action.
“You can also pass any information on suspected drug supply via our social media desk @MerPolCC on Twitter or 'Merseyside Police Contact Centre' on Facebook.
“Alternatively, please contact the independent charity Crimestoppers anonymously on 0800 555 111 or via their online form at: https://crimestoppers-uk.org/give-information/give-information.”
Craigslist were approached for comment but did not respond.