Bought a good, used Cybernet Elite-4i Zero-Footprint-PC for $14.99 + tax at a local thrift store yesterday. It's got a bit of cosmetic issues (crack on the palm rest in the vicinity of the FDD/memory card reader area and small, scoring on the plastic in the Cybernet logo area) and a missing plastic piece that goes in the spot where a floppy drive or memory card reader would be installed, plus, some marker is left on the casing, but I almost got all of it off.

System before the cleaning

System after the small cleaning

Inside

Replaced the clock battery and made changes in the BIOS (time, date, settings for the FDD, and so on). Will it boot?

It lives! And it booted pretty darn quick as well.

System specs:
80GB Western Digital
CD-ROM drive
Intel Pentium 4 3.2GHz --> frosting on the cake
2GB DDR --> toppings on the cake
Intel Graphics (yuck) --> crap, but better than the Intel Extreme GPU, might get a PCI riser card and install a GeForce 6200 PCI inside.

Linux Mint 19.1 Cinnamon being installed

Rating: 4.5/5

Missing FDD and internal modem, but I can possibly source parts and I think I can fit an IBM ThinkPad 380D floppy drive inside, yet I need the ribbon cable for the drive itself or I can take the ribbon off of my Pavilion N3350 laptop and install the FDD and see how it goes. As for the modem, I'm either deciding on getting an external modem (which will be better anyway) or get a PCI riser card and install a PCI modem. That, and AC'97 audio isn't the best at all, but, it's better than nothing and the integrated speakers are pretty cool.

Future plans would be to turn this computer into a Dial-Up server for older machines that only has a modem and no expansion for an Ethernet card.

Video of the system in action: https://www.youtube.com/watch?v=fbNKEw7Wyb8