Hello there!

I don't know a thing about photography and recently inherited some photo stuff.
I am trying to sell it, and have found info on how much to expect in almost everything except in this one thing:

Konica Hexanon UC Zoom AR 45-100mm F3.5

The info I have found is that it is rare because was made 1976 only, and it has a very wide range, and it may be a collectors item, but I don't have any idea of how much it may be worth.

Any idea anyone?

I will greatly appreciate your help!