Other collecting activities?

I must admit that I have never worried about cosmetic damage (scratches, etc) to anything I own. Yes, I care -- a lot -- about scratches on optical elements, on disk heads, on things like that. Yes, I care about damage to the body castings so the lens no longer sits true, or to disk drive chassis castings so the heads no longer stay in alignment, etc. Of course I do. But to me, equipment (computer, photographic, tools, etc) is made to be used, and it will show some signs of use. I'm an HP calculator enthusiast, but I am not a 'stamp collector' (to use the UK club term). I don't care if my machines look a bit beat up, with worn markings, holes through the label so I can get to the case screws, and so on. But they have to work. I want to calculate with them, hack them, etc. -tony