You could always hop over to https://frame.work and pick up a refurbished Intel mainboard plus an enclosure (or 3D print your own using their plans). You’d just need to get some RAM and a small SSD to run an OS like TrueNAS and you’d be good to go for probably under USD $600.
HTC Droid Incredible in July 2010. That phone was a slow piece of shit and I loved it.
I got my Framework 13 in February 2022 and I love it. I’ll end up getting the AMD mainboard when it becomes more widely available, then take my old mainboard and RAM, put them in an enclosure, and make that my new NAS. Then my current NAS, which is just a Raspberry Pi, I’ll turn that into a PiHole.
'Tis a mighty fine pueblo fort, but 'tis no WWII bomb shelter, English.
Take a look at Minifree Ltd. For less than USD $500, you can get a decent ThinkPad with Libreboot and your choice of Linux distro (KDE Debian is installed by default).