Authorized resellers like StackSocial, Amazon, or even Microsoft’s own sales occasionally offer discounted Office 2019 or 2021 keys for as low as $30–$50. These are often OEM keys but are legally safer than cracks.
If you need an article on how to install Office 2013 legally using a genuine product key or how to migrate to a free alternative, I’d be glad to write that for you. Just let me know.