On Gregslist, it is possible for people to put almost anything, literally, up for sale, even themselves: however, they must be 18 years old or older, have a valid state ID, and sign a faxed waver of approval to do so.
Jonah Flenderson once put himself up for sale on Gregslist. Almost immediately after coming back from overseas from serving in the military (primarily as a barrack janitor), Flenderson accidentally burned down his house. Since he had no place to live, he would put himself up for sale on Gregslist in hopes of someone "buying" him as a roommate. Flenderson's at the time arch-rival Katrina Leggo (known then as Katrina "Kyla", as she was not yet married) discovered Jonah having listed himself on the website. Disgusted by the entire ordeal, she informed one of her former classmates about the situation. This classmate also happened to know Jonah Flenderson in person (as all three attended the same university for a brief point in time), so he decided to "buy" him, out of spite. Jonah was successfully purchased on Gregslist