Updated by Charles Eberline, listing this website as a source of information: https://www.agohq.org/classified-ads/.
A classified ad posted November 13, 2017, at the "Classified Ads" webpage of the American Guild of Organists, accessed March 4, 2018, https://www.agohq.org/classified-ads/, states:
Bigelow Tracker (1992)
II/15 Ranks with full length 16â€² Posaune. Detached key desk with bone keys, mechanical key and stop action. Quartered white oak case, 19â€² tall x 13â€² wide x 5â€² deep. Currently located in its original church in Madison, WI. Church is relocating and is asking $70K. Add cost to move and install; photos and specifications. [This information is followed by an e-mail link and a contact phone number at Bigelow & Co.]
As of the date of this note, the organ was also listed for sale at the website of Bigelow & Co., accessed March 4, 2018, http://bigeloworgans.com/opus/23-stop-list.
Updated through online information from Michael L Bigelow. -- Mechanical Either/Or stop action. Most stops can be played on either one manual or the other. The Stop knob slides up for top manual, down for bottom manual. Mid position is off.
Status Note: There 1993
Stops on one chest, duplexed on both manuals.