Great rifles, classic European style, all steel construction, huge following in Australia.
Mate of mine collects them, so far he has 40 rifles, ranging from 1946 manufacture to 1960.
I own/shoot Model 5, made in 1958 and wouldn't part company with it for any money.
When you inspect the rifles, you should find on the left side of the receiver and on the barrel, just in front of the receiver 2 digit #, which signifies the year of manufacture.
If you can, get the Model 1 or Model 5, both light weight barrels, which great 2 stage triggers.
The model 2, is also good but get one that was made before 1968, as after the Russian invasion the quality dropped markedly.
The # 3 and #4 rifles are target guns with heavy barrels.
Personally, I wouldn't bother with the CZ models, as they are nowhere near the quality of workmanship and finish of the 'genuine' Brno's.
Also, try as many different brands of ammo in the rifle as possible, as you will find that rimfire rifles have 'liking' for different ammo.
Mine isw extremely accurate with the Remington Yellow Jackets and the Winchester Subsonic HP.
The rifles are dovetailed for 5/8" scope mounts, which are available.
Added some photos of my Model 5.