1979 cromemco system three

I bought this awsome computer at a yard sale the guy that was selling it didnt seem so know much about it he said it use to belong to his grandpa and he left it to his dad but his dad saw it more as junk then a vintage item and was about to take it to good will when he ended up buying it off his dad for $50 but the new owner tried to do some research about it but never got into computers and shut it down and its been in his closet for the past 3 years so the guy was unable to answer allot of the questions i had before buying it but i decided to take a risk and buy it from the guy for $100 so now im doing my own research about this beauty but depending on how much its worth i might sell it since im in a bit of a tough situation financially after loosing my job and getting my car repoed I hope this is worth something to give me that jump start in life to be back on my toes and that this vintage computer can go to a collector who will appreciate her beauty
The Cromemco (named for CROthers MEMorial Hall - the Stanford residence where the founders lived) System Three is a microcomputer with the features you want and need to do professional work in almost any field; engineering, science, business/accounting, word processing, data-based management, education, medicine, and others.

The System Three is available in a multi-user system that lets you do the tasks usually associated with much more expensive time-share computers. You can have up to six terminals, a fast printer, a large RAM memory, and more.

The System Three consists of a fast, powerful, Z80-based microcomputer with capability for enormous RAM memory expansion and with provision for up to four floppy disk drives.

Not designed as a desktop system, the System Three is a large and heavy chassis intended to be rack-mounted or built into an office desk.
The computer has a large 21-slot motherboard to accept a large variety of memory and I/O to suit virtually any application.

In the microcomputer field, the Cromemco System Three stands alone in the range of features and capabilities it offers.

Available Operating Systems include Cromemco CDOS, similar to CP/M, and CROMIX, which is similar to UNIX.

The Standard System Three utilizes the industry standard S-100 card bus, and is supplied with 64K RAM (expandable to 512K), a dual Persci 270 floppy drive with 2.4MB capacity, and a parallel port for a high-speed printer.