# Secondary Sales Degen Dogs are ERC721 tokens, and can be traded on any marketplace that supports ERC721s on the Base network. ### Degen Dogs Club on OpenSea OpenSea is an NFT marketplace for NFT collections on Base Chain: --- # 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.degendogs.club/basics/secondary-sales.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.