While you can find for as low as $6.00 to $15.99 through third-party retailers, it is important to know that Microsoft officially ended support for this version on April 11, 2023 . Important Considerations for Office 2013
: Office 2013 is no longer a supported client for Microsoft 365 services, which may lead to performance or reliability problems when trying to use cloud features.
If you still require this specific version for compatibility with older systems (like Windows 7), several merchants offer digital keys: End of support for Office 2013 - Microsoft Support
: The software will still open and allow you to edit local documents, but you will not receive any further software updates. Where to Buy Office 2013 Cheaply
: Because support has ended, Microsoft no longer provides security patches or technical fixes. This leaves your system vulnerable to viruses and malicious software discovered after the end-of-life date.