Like most cyclists, at least C&V ones, I've got a stash of "treasures" awaiting their day. You know, things like those NOS Suntour Superbe Pro hubs, things like that. But then when the day comes along to use them, I'll end up on ebay finding a slightly used version of the same part, preserving that special part, well, forever.

I'm wondering if this is a common affliction and what motivates people to finally give in and install/use some treasured part they have around.