# Space sale The property rights to digital real estate of Spheroid Universe are recorded in the distributed public ledger (blockchain). The Ethereum blockchain is currently used. ![](https://399262552-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FBXBzNDQwNIWzyxRrkDrN%2Fuploads%2Fgit-blob-81d8d708da7c74106084ec0c58a8c4b21cae2b7d%2Fventa%20de%20espacios.png?alt=media) The primary Space marketplace has been operational since Q4 2017, implementing Space purchase mechanisms and recording purchase data in the Ethereum public blockchain. As of now, the set of functions related to the registration of property rights has been implemented from both technological and legal viewpoint. The most important factor in raising the attractiveness of Spaces as assets is the possibility of selling them. The secondary Space marketplace, which allows platform participants to resell Spaces on the open secondary market will be launched in Q3 2018. --- # 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://spheroid-universe-academy.gitbook.io/white-paper/modelo-de-negocio/untitled.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.