In-game items can be either cosmetic or functional, and players can purchase them for real money or in-game currency. There are in-game items like skins, that change the appearance of characters, and weapons.
In-game items can also be unofficial game currency (gold, diamonds, armor items, crafting materials, etc.) that can be traded between players by using an internal game trade system such as mailboxes, direct trade, auction house, or any other methods provided by the game system.