Prices appear to have gone up a lot for this pin in the last two years, perhaps more than others. Those prices are speculative though, not sure what they are actually selling for...
I joined the club a year ago and cannot imagine a scenario in which leave the club. I love it.
I have a page in a pixar art book that's filled with just eyes that they used. That might make a nice source of replacement eye stickers if people want to make their own.