I buy old laptops and corporate desktops off eBay (and FreeGeek) constantly. I really hope people sell them instead of recycling them. They're not worthless, especially to people like me with zero interest in Windows.
The only reason most of these computers cannot run W11 is the graphic card, nothing more, they can have 16+ gigs of RAM, can be upgraded with internal 5G wifi cards for cheap, and yes, I still use ExpressCard PCMCIA extensions as well (to add USB ports for instance), or even docking stations!
edit: they are easier to repair as well or find parts for because the design goal wasn't to be ultra-thin or ultra-light.