Here's one that's somewhat interesting.

A mid-80's CZ-75 as it came from the factory NIB and unfired to this day. I have a few others that I do shoot.
I doubt that this gun is particularly valuable, but it is somewhat unusual.

Here's why. The picture says it all. It was made in Switzerland. I think this was a gun that was made while CZ was in negotiations to have the gun made from behind the Iron Curtain. The deal fell through, but apparently some guns are marked like this one. I read about them now and again, but have never personally seen another like it.
The gun came in the original flimsy cardboard box with the usual not too inspiring test target from the factory. Fit and finish do not seem any better or worse on this one than my other Pre-B CZ75 pistols.
Best.