It is a section of kogama where you can buy models and avatars, acambio de oro, here sellers publish their creations to win.
How to use MarketPlace
Just select the object you want to buy and give it to buy.
Currently models cost 10 gold on the Marketplace, and these may be used for your game creations.
Avatars cost 50 gold, and it helps you to have a cool avatar and not look like a simple tourist, it serves to improve your appearance the way you want.