Since Microsoft has stopped selling Office 2013 directly, you must look to third-party retailers. Be cautious of "too good to be true" prices, as these often involve unauthorized volume keys that may eventually be deactivated.
4 Ways！How to Find Microsoft Office Product Key (Office 2007~2019) product key for ms office 2013 top
If you previously had Office 2013 installed but lost your key, you can often retrieve it from your system using these top-rated methods: Since Microsoft has stopped selling Office 2013 directly,