Microsoft Office Pro Plus 2021 - $50 Lifetime License

Looks like StackSocial is running this sale again. I just received this in my Inbox.

It's for a legit Lifetime-License key for $50 and it works fine. I picked-up my copy there the other day and it Installs and Activates without a problem.
Looks like the sale for the Windows version ends in 5-days.

Microsoft Office Pro Plus 2021 for Windows

I hope this helps someone.
I received my key instantly. A Microsoft Account is required to redeem. I installed the Windows 64-bit version via the offline-installer file I downloaded.