Red market may refer to:
Organ trade, the trading of human organs, tissues, or other body products
The Red Market, a book by Scott Carney about economic transactions around the human body
"Red Market" in counter-economics, meaning market of violence and theft not approved by the State
Red Market, in Santo António, Macau, China
Wikipedia https://en.wikipedia.org/wiki/Red_market
Coordinates 22°12'19.449" N 113°32'41.275" E