I'm trying to determine the value of our club's vintage 12.5" classic Ritchey–Chrétien.
This telescope was purchased in 1967 by the University of Maryland for $8k with an observatory-class mount.
The telescope was manufactured in 1967 by Optical Craftsman.
As delivered from the factory, the telescope never delivered the quality views that were hoped for. Hours were spent working on the telescope, and they determined that while the primary mirror was well formed, the center hole had been drilled slightly off center.
The mount was moved to another telescope, and the OTA was eventually purchased by the Hopewell Observatory in VA. It has been sitting for some time now in storage at the Georgetown Mirror Making club.
This was an observatory-class instrument as sold back in 1967. There are tons of notes on tuning the telescope and optics. As a Ritchey–Chrétien it has hyperbolic mirrors. There is no focuser at the rear of the telescope to hold eyepieces.
The OTA is massive, and heavily engineered.