I dunno I have had a weird thing for these caps for long before I got one, before I joined GH or before I knew how sought after they were.
Used to look at them on EK often wondering if they would ever restock. Now I have a few that I have paid silly money for but to me even then they are worth it.
Only got one in use currently - the topre tri colour, it's a beautiful bit of plastic. Pics don't do them justice.