No, we're not talking about heads, either. Flickr / Mo Riza In a monetary sense, your physical body is worth more than you may think. People will pay hundreds, and sometimes thousands, of dollars for certain body parts.

It may be Halloween, but we're not talking about severed fingers.

Note that "selling" a body part isn't the same as putting your futon up for sale on Craigslist. With the exception of selling ad space on your skin, most forms of giving body parts are technically donation, but it's common practice to be compensated in cash.

Being compensated for all of the parts listed below is legal, but we don't necessarily recommend it. There are other — more conventional — ways to supplement your income.

But if you're curious to know how much your hair, plasma, and other body parts might be worth (or you're looking for a Halloween chill), read on to find out.

Mandi Woodruff contributed to an earlier version of this article.