I am always looking but I am not really full of knowledge when it comes to these. I was wondering what kind of personal experience have you guys had? Are there years to avoid or look for... I think about the only thing I really know about them is that the 850 is a vibration king and that after 73 they had disc brakes. Any of that true? I have been to the Specialty website dedicated to them but I am wanting to hear from this group not those. Thanks.