You can get a 5-year-old laptop with a perfectly working screen for free if you're on good terms with the owner of a company who has a stack of them sitting in a storage closet waiting for disposal. :)

Which is basically just cutting out the middlemen in a transaction that might cost $100 on eBay.

Used corporate laptops are particularly cost-effective if you're interested in running Windows, as unlike Intel NUCs and most SBC products, they typically include hardware-locked Windows 10 Pro licenses which can be upgraded to Windows 11 Pro for free.