If there is one place that is always full of surprises it's buy and sell sites. Buying and selling secondhand stuff is great, people save money and nothing goes to waste, it's a win-win. There are so many buy-and-sell sites around these days that anyone can find just about anything secondhand. There are the classics like eBay and Craigslist, and then, of course, there is Facebook marketplace.

These sites all have their unique features but one thing they have in common is that there is insanity to be found on all of them. While it is true that one person's trash could be another person's treasure, some people will do anything for a buck and some stuff just belongs in the trash. The possibilities of what might pop up on a buy-and-sell site are endless, and sometimes it shows just how far some people will go. Here are 25 insane listings from around the web that might leave some people scratching their heads.