Getty Images James Daw- Toronto, ON, 01/17/2006 James Daw with a computer terminal in the Star newsroom.Two columnists have built 'robot' stock portfolios using the Bloomberg terminal. 'Dorfmans 'robot' is a Bloomberg News terminal, an amazing source of data and analytical tools found in newsrooms and investment houses. He used Bloomberg to find 10 stocks from a list of 2,100 large American companies last year.' (Photo by Carlos Osorio/Toronto Star via Getty Images)

For years the Bloomberg new service has run Bloomberg Terminal, a computer system that gives users access to enormous amounts of real-time data on financial markets.

It costs $20,000 U.S. per user per year to subscribe, and it’s one of the main reasons Michael Bloomberg is the eleventh-richest American. Most of his company’s $7.9 billion in annual revenue comes from those machines.

But with a $20,000 price tag, you can be sure the people accessing it have money (except for maybe, ahem, financial journalists) and so it makes sense that the terminals have become a venue where the ultra-rich do their buying and selling.

This Buzzfeed article went viral this past week, highlighting the amazing things super-rich Bloomberg Terminal users are selling on one of these social sites. POSH, as it is called, is the service’s “Craigslist-like” classified ads section.

Subscribers can buy everything from from a $20-million Italian castle to a $40,000 “dressage horse.”

Well I never.

Business Insider laid open Bloomberg’s Craigslist-like service a few years ago, taking readers through the user experience.

Here is the entry page: