67 Z28, rare?

Hi guys I got a ? for you. A family member showed me his all original numbers matching 67 Z28 the other day with the 302 in it. Are these cars rare, I know the story about the 302 but I dont know if they were common or not so if you guys could fill me in that would be great.

Well since there were only 602 of the Z/28 made in 67 I would say just being a Z/28 makes it rare.