> For the complete documentation index, see [llms.txt](https://shedever-studio.gitbook.io/chess-zombies-wpeng/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://shedever-studio.gitbook.io/chess-zombies-wpeng/ammunition/general-info/in-game-purchase.md).

# In-Game Purchase

#### In order for the player to be able to buy and sell ammunition, he needs to build a "Market" in the Citadel.

The level of the Market determines the rarity and type of ammunition that can be bought and sold on it.

The higher the level of the Market, the more rare ammunition can be bought and sold on it.

#### You can find more detailed information about the Market in the "[Market](/chess-zombies-wpeng/structures/civil/market.md)" section.