There are definitely a lot of people that collect / accumulate Case knives.
My main interest is the older ones. I have a weakness for red and green bone.
Not to be confused with the current offerings
There are so many variations, you could never possibly collect every one of them. Don't get to worried about the on going CV vs. Stainless Steel debate.
Buy what ever catches your eye and fits your pocket book....
You really need to venture over to the Traditional s/f.
There is a lot of knowledge to be had, and folks are happy to share and help out with questions. PLUS, they just great people. Almost forgot, there are a lot of great pictures to look at too. Production and custom knives
One other nice thing about Case, is that they are still in business here in the U.S and if you ever have any problems with one of their products, they have great customer service.
Most won't increase in value, with the possible exception of some very rare and desirable models. And that can fluctuate....
IMO if you look at them hoping to possibly make money on them, it will take a lot of the fun out of it.
As long as you don't over pay for one, you can use it for a while and if you don't really like it, you can sell it without losing very much money. Or you could even trade it. Over at the Traditional s/f, there is a slip joint tradin thread where you can swap out slip joints