First things first: I am not acquainted nor familiar with the ST series of computers but will do my best to answer any questions. "Working condition" means that I connected this system to a monitor (SC1224) and mouse, powered on the system and arrived at the desktop GUI.
Atari 1040STf, working
$175, plus shipping. (UPS or FedEX / Origin ZIP: 48857 / Weight: 16 lbs including packing materials)
PayPal accepted, Friends & Family as I am not a business.
Please review all included photos as to physical condition of the unit.
Notes: The second photo below provides better demonstration that three caps have been replaced on the keyboard (lighter in color, so I am guessing replacements). Boots to TOS, no other tasks carried out with it, sorry. Also, left panel has yellowing discoloration.