Online marketplaces and trade apps like the one found on Facebook or sites like Craigslist make it easy to buy or sell just about anything someone doesn't want (or actually does want on the rare occasion).

As the old saying goes, one man's trash is another man's treasure, and while this saying may be true in many cases, sometimes some items truly are just trash. Selling a car, or some furniture to make room for new stuff? Sure. Selling leftovers or questionably clean articles of clothing? No thanks.

Luckily for the rest of us, seeing what some people try to sell is quite entertaining. Many of these strange items can be found documented on Reddit's /r/CrackheadCraigslist.

This subreddit has so many bizarre things to see, hopefully these sellers find the perfect person for their items. Hey, maybe someone here will find just what they are looking for on there. Here are 25 strange and very questionable items people are selling online, hoping they can make a buck or two.