Being able to buy and sell things online is one of the most helpful parts of the internet. This feature, which is available in many forms, both as standalone sites, such as eBay, Craigslist, and tools on social media, like Facebook Marketplace, allows people to earn a little bit of money and find some hot deals.

It's a win-win for everyone involved in the process. Anyone can sell just about anything online, within reason, and while this is a great thing, this also comes with its weird side, of course.

People are just odd sometimes. So, just some light scrolling through a place like Facebook Marketplace can reveal some true mysteries.

It's hard to say whether or not many of these things are jokes or not, but knowing the Internet and the people who frequent it, it's easy to think they may be serious. It's both an entertaining and confusing time searching on buy-and-sell sites.

Here are 25 strange but real listings found on various buy-and-sell platforms.