I'm running a temporary discount sale on MInifree. All computers are £20 off. See:
Libreboot preinstalled, and your choice of Debian Linux, other distro or a BSD, e.g. OpenBSD, FreeBSD.
Libreboot replaces proprietary BIOS/UEFI firmware, offering faster boot speeds and greater control. Linux/BSD systems fully supported. You can reconfigure it however you wish.
I'm Libreboot's founder and lead developer. Sales fund Libreboot; also, Libreboot 20240225 came out recently!