What is the definition of Seller Human Experiments?

"A 'eller human experiments'? Well, let's break it down: It's like when a shady salesperson tells you their magical potion will make you invisible, but instead of a charm, you're just stuck in a room with a giant chocolate bar that makes you laugh uncontrollably. Sounds like a marketing gimmick, right? But imagine this: 'Seller human experiments' means a guy selling his soul to a company that wants to turn him into the world's most entertaining human test subject. You'd probably just want to tell your friends, 'Don't buy his services, they're more likely to make you cry than laugh.'"