This HP PC was upgraded with an Advantech AIMB-566 motherboard with Intel Core2 Duo E8400 3GHz processor and 8GB (4x2GB) RAM, running 64-bit Windows-10 Home on a 300GB Intel SSD, all in a chassis 15" tall, 8" wide, 16" deep. Front has a CDROM drive, a CD/DVD R/W drive, 3 USB ports, line in, earphone, microphone. Rear has a DVI-D video port (w/ VGA adapter), 4 USB, line out, earphone, and ethernet. See all photos.
You can have the PC (& power cord) for just $25, or the PC plus 19" Dell monitor (15"x12") for $35 total. I'll throw in the original (matching) HP PS2 keyboard & mouse if you want them, and you'll have a complete Windows PC system!