There's a private Craigslist inside Bloomberg Terminals where Wall Streeters are selling everything from Ferraris to Italian Castles

Thousands of people use a Bloomberg Terminal every day to do their jobs. It's one of the most useful machines in the world, and is the workhorse of the financial industry with up-to-the-second data and news from around the world.

There are some extremely handy functions inside the $30,000-per-year Terminal: everything from stock quotes to financial analysis and an instant messenger that some people could not live without.

But there's another, lesser-known function - aptly named POSH - that allows Bloomberg users to list anything they want to flip for some cash.

We went through the current listings to find the most opulent and ridiculous items and services for sale right now. Here are (just a few) of our favorites: