The C67 may seem a bit expensive to most of you, but when you actually get one in your hands, you might change your mind. This knife is extremely thin and lightweight, and rides in your pocket well for the size of the knife. I believe, and correct me if I'm wrong, that much of the cost os coming from laser cutting and machining the aluminum scales for this model. It is much more sophisticated than the C35, IMHO.
This model will only be produced in batch quantities, so there won't be that many of them around.
I hope this makes sense and answers some of your questions.
Take care,
Rafael