Here's an idea for women looking to make a few quick bucks: sell your dirty underwear. Didn't know there was a market for it? Well, there is, and one woman who wore her panties for a solid three weeks and then sold them for $5,000.

The 21-year-old full-time student signed up on Sofia Gray, an online marketplace for "lovingly used underwear." She told Cosmopolitan, "I saw that some girls were making good money from this, so I thought I'd try it out," adding, "I try to list three or four pairs each week, although I can get a bit lazy."