Here's a thought. I have an older Asus laptop, with an i3 350M proc, 4 gigs ram. I wanted to sell it but the sell price was bad so I started using it as my media center. I added an external hdd of 2 TB, couldn't be happier. It's connected by wire to my main router, so all TV's can access everything on it with no lag.
If usable, clean install of a new OS, and donate to someone who would otherwise not have a system.
A media center for your house.
A whole house firewall box.
a disposable testbox, that you can wipe as needed. I have a now 10 year old low end Toshiba, that I used for initial Win 10 testing when it was first released.
However, I also have a kneehigh+ stack of laptops in the garage, that are absolutely no longer usable. Various levels of broken, or simply too old.