Jetz you must remember that at one point I owned a motorsports business and,as such, was "in the grapevine" and "in the loop".In addition to selling newer machines from the business and vintage machines on the internet, I was exposed to new leads on a weekly basis about rare and exotic machines.
One lead, for example,was about a half dozen Carabelas. I remember driving over 200 km's into the bush in the middle of Winter to find the guy's cabin perched on a hill surrounded by a howling pack of "wolf like" dogs.I'm not sure how, but I managed to knock on the door and purchase the Carabela's.
It was a treasure trove of rare Mexican motorcycles, one of which was a 1975 125 Enduro with 4 miles on the odometer. Now a person may argue how desirable these machines are, but let me tell you they are a fascinating viewport into the era.
Now the CZs are before my time, but in my exposure to these machines I have found them to be a very high quality motorcycle.If you are exposed to such a diversity of motorcycles from so many different eras you soon learn to distinguish between what is progress and what is hype. You also learn to home in on gems of the past, and there are many.