# Marketplace Trading The **Marketplace** is where your NFTs go to work. Want to earn? You've got at least three strategies: * **Open an NFT Box** and sell the Commanders or Turrets you get to players who missed the box sale * **Open an NFT Box** and upgrade your drops in-game or through staking, boost their value - and sell for profit * **Buy NFTs** on the Marketplace, level them up, and flip them for more ⚙️ **Simple**: the more you develop your NFTs, the more they're worth. Pick a proven path - or create your own strategy. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.zombietd.app/how-to-earn/marketplace-trading.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.