According to the search results, harvested organs are a type of contraband item in the game Starfield that can be sold for credits. To sell harvested organs or any other type of contraband, players need to visit the Trade Authority building located on various planets across the galaxy. The best location to sell harvested organs is The Den in the Wolf System, which is close to the Alpha Centauri System and doesnt scan the players ship for contraband. However, players need to be careful when carrying harvested organs as they are classified as contraband and will be flagged by system scans if they enter a monitored system like Alpha Centauri, Cheyenne, Sol, or Volii. If players are caught with contraband items, they will need to pay a bounty to the authorities and give up their illegal items. Alternatively, players can smuggle and sell contraband items to vendors willing to take the risk.