Welcome to Etsy's version of the Deep Web.

Beneath the veneer of cute tote bags, there exists a realm of darkness. (via Etsy)

Even though Etsy lets you sell jewlery for storing all sorts of human products, there's a restriction on the actual human products you're allowed to sell. When they updated their Prohibited Items list in 2012, they banned the sale of anything coming from a human body, with two strange exceptions:

Human remains or body parts (excluding hair and teeth): This includes, but is not limited to, things such as skulls, bones, articulated skeletons, bodily fluids, preserved tissues or organs, and other similar products. (Note: Human hair and teeth are currently allowed, so long as the items comply with other Etsy marketplace rules.)
Sources: Etsy