Dtc,
No offense taken. I just wanted to make sure that you understood I was not attacking Sumiko/SF. My comments were just comments (not an attack) and were aimed at any manufacturer that makes a decision not to support gear purchased on the used market that originally came from an authorized dealer. Again, I understand the need to protect dealer networks as much as possible. Market forces will ultimately decide what works but I believe that a company that doesn't warranty such product will eventually be forced to change that policy or go out of business.
To extend the car analogy - imagine if, when you wanted to buy a new car, you had no market for the old one. :)
Phaelon, I think this should be a lesson to buyers and sellers alike. Buyers should get the original sales receipt and sellers should make sure they keep up with it to provide their buyer with some protection. Maybe it's just me but it amazes me how many ads I see that say they can't find the manual or this or that accessory. If they can't do this what's the chance of them having the sales receipt? Sheesh.