VAULT OF EVIL (1973) #18

Reprint of the 6th story from Marvel Tales #110 A man visits a convicted killer in jail and offers to sell him a pill for five hundred dollars that will make him appear dead in order to cheat the electric chair. Once he has been buried, he will dig him up. The killer agrees, but has no money, so he extorts it out of his brother. He takes the pill and it works, but instead of taking him to the morgue, the police wheel him into a group of medical students with scalpels. It turns out his brother sold his body to dissection study for five hundred dollars.