“Can you do $40.00?” asked a seller on the app OfferUp to a buyer looking for a bargain. “$40 works, can you meet up today?” the buyer typed. One hour later in front of a TGI Friday’s restaurant in Orange, Calif., a man pulled up in his clean black SUV, waving four insulin pens. He took the $40 cash for the insulin, and after a short conversation, he took off and ironically drove past the walls of a jail facility in the direction of his home. This is considered a “black market insulin” exchange—the purchasing of insulin outside of a pharmacy through a business transaction networked via social media and/or online selling services. United States law labels the transaction as illegal, due to the distribution of a prescription drug without a license. But since insulin is not classified as a controlled substance, the repercussions of exchanging the medication are murky. …