I have seen LibreOffice on sale in a shop or on the internet - is it from you?
(Note: posted by Mike Saunders from The Document Foundation. I'm adding this as a link on https://www.libreoffice.org/get-help/... so that people can discuss here further, if necessary, like with the other questions on that page. Thanks!)
Mike, I would add a note on https://www.libreoffice.org/get-help/frequently-asked-questions/#paidversions to the effect that TDF does not charge for any available download of LO products.
In addition, there's now a version offered under official license from TDF also for the Windows Store: https://www.microsoft.com/p/libreoffice-vanilla/9npr3bznj4dm