I collect mostly newer knives and nothing terribly expensive or rare. As far as Camillus, I'd be happy to find a 707Y to complete my YJ collection (the folders anyway). I don't have the serrated 712, either, but that doesn't feel like a gap in my group. That said, I'd probably not walk past the 712 or any of the SMKW stag(ish) handled YJs at the right price.
The YJs are a "collection" I never intended to collect, but I liked the YJs so much I've bought them up. Usually my "collecting" involves little more thought than buying knives that I like, especially if I either had them, wanted them, or remember them from childhood. There's plenty of common knives that I want badly and don't have....just because I'm waiting for the right one at the right price to jump in my lap
