All three are functional and include both RAM and a blank 120GB SSD. All three will boot Debian Linux (or other Linux distros) but I'll leave installation of an OS to the new owner. Since they are legacy BIOS machines, Windows is not _officially supported_, but from experience I know this is feasible, and a quick google of "Windows 10 on BIOS MOBO" will show that this is still being done.
The cases, PSU's, SSD's, and are worth well over $100 conservatively.
#1 - Tower Case, Intel Q9650 processor, Gigabyte GA-EP45-UD3L Motherboard, graphics card w/ VGA|HDMI/DVI, Gb ethernet, USB2.0, RAM (8GB?), DVD/CD burner, PSU, high quality fans; wifi card, runs Linux very well, also used w/ Windows but no longer officially supported. BIOS. SDD 120GB included. Lots of SATA ports.
#2 - Small Form case, i5 processor, Gigabyte GA-H61N-USB3? (Rev. 1.0) w/ integrated graphics HDMI|VGA, Gb ethernet, USB2 and USB3, RAM installed (4-8GB?); DVD/CD drive/burner, PSU; SDD 120GB included, 2 SATA ports. BIOS.
#3 - Small Form case, i5 processor, Gigabyte GA-H61N-USB3? (Rev. 1.0) motherboard, w/ integrated graphics HDMI|VGA, Gb ethernet, wifi card, USB2 and USB3, RAM installed (4-8GB?); DVD/CD drive/burner, PSU; SDD 120GB included, 2 SATA ports. BIOS.
**I can tell you that I ran Windows 10 on these for years, Linux (Debian) works well on them. In their heyday, they were Hackintoshes, but that is a thing of the past now. Any Windows installation on them now will have some limitations and is no longer officially supported by Microsoft, as I understand it.
#1 was my workstation/buildbox/Hackintosh Pro for a long time.
#2 was our Hackintosh Media Center for 10 years.
#3 was my Zwift box for many years.
Cases are in OK, but not pristine condition - front USB port flap is missing in #2, DVD drive cover (flap) is missing in #3.