Can you sell stuff on Adopt Me?

Could you please elaborate on the possibility of selling items within the "Adopt Me!" game? Specifically, I'm curious to know if there are any official mechanisms or marketplaces provided by the game developers that allow players to trade or sell their in-game possessions, such as pets, accessories, or other collectibles. Additionally, are there any third-party platforms or communities that players typically use to facilitate these transactions? If so, what are the safety considerations and best practices to follow to ensure a smooth and secure exchange? Thank you for your time and assistance in clarifying this matter.