Hair is, relatively speaking, gross. If you don't agree, go pull some from a stranger's shower drain. However, to the right person under the right circumstances (which is to say not from a shower drain) your hair can be worth a pretty penny. Many pennies, even. If you have a foot of hair to spare and it's in good health it can be worth over $500 to wigmakers.

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Several years back, hair was at a premium and could fetch thousands of dollars. Now, however, the market is oddly more saturated than you'd think, and if you Google it you'll happen upon no less than a dozen sites willing to buy your hair right now. So the golden age of hair selling may be past, but $500 isn't anything to sneeze at, and, at the rate of normal human hair growth, you could maybe get that much to sell again in 18 months or so. It's not a retirement plan, but it could sure buy a lot of chicken wings.