I bought one for $299.99 NIB in early 2001. These were the most common and most "basic" 75B series pistol available NIB from @1997-2001. The promotional offer was so popular that CZ-USA began remarketing some 1999 commercial pistols as the "75B Military" in 2000.
The 1996 production year pistols are in fact production overruns from the Turkish military contract. As mentioned above, the 1999 production year pistols were commercial 75Bs offered with one 15 round magazine and one 10 round magazine, as well as the plastic thumb-rest grip associated with the Turkish contract specs.
There is nothing particularly special or collectible about these pistols. They were essentially a "loss leader" for CZ-USA to generate interest in their product line. In my case, it definitely worked. It was my first CZ, and I now own six of their firearms. (Nine, if you count used ones not imported by CZ-USA.)
I ended up selling mine to a friend to finance a 75B SA.