With apologies for the brag, I grabbed this in the early minutes as a buy it now. This is a Questar 7, with a rotating turret of reducers and Barlows. Possibly filters.
My price was equivalent to the sales tax back when it originally sold. About the same as I paid for a new six-cylinder BMW about the same year.
This was for distant surveillance (the manual graphs the field of view at 1-5km), maybe mounted on a roof or a tower structure, with a video camera transmitting images to a viewer indoors nearby.
It would be interesting to get it up and running with turret and focus inputs mapped and controlled. The paddle (I have a dormant one from a similar 90mm model microscope) would also have controls for aiming motors.
Alternatively, I could pull the optics, swap them with a cracked corrector set from an old Q7 barrel with control box, use the cracked set for this for display, and mount the classic barrel to the spare Q7 mount packed for shipping in my closet to create a complete Q7.
I believe this has the large baffle for contrast in daytime conditions with more-off-angle stray light, at the expense of light-gathering, and that would be a sensible change for night use.