So when someone owns a Mimic pony that means they're officially an MLP collector? :/ what about someone who owns G3 Rosey Posey the Children's Charity Ball hospital pony? ;_;
NO, you can be a MLP collector without owning a Mimic.
There is an aspect to any form of collecting. It can be MLP, it can be transformers it can be beanie babies. Regardless of IF the item really is rare - sometimes certain items gain and become a status symbol.
If you want me to compare it to something, it's a bit like the flu - one person, somewhere at some time decided to pay more money for a Mimic - people talked about it - and it became like an infection.
They were talking about this 15 years ago, wondering why people were willing to pay more for a pony that seemed relatively common. I'm not saying she's a Peachy or a Sundance; but I have never saw where Mimic was any rarer or limited compared to the other ponies in that set.
It's more of a situation where she has gained status because of a snowball effect. If you notice from what others have pointed out in this thread. We don't go very long in the MLP online community without someone bringing Mimic up and asking why she is so popular.
It becomes more snowball, getting bigger and bigger - and people come up with all sorts of reasons for why. Even things about her being short boxed and other such things. And then those 'ideas' become a reality because people just repeat it in a thread. So more snowballing downhill, making the status bigger.
So, with the flu comparison, it's a shared thing, one person giving it to another, because some are willing to pay more for a pony that is perceived to be rare or because it's a pony that for the last 18+ years gets brought up in the community.
This thread has just infected another collector with Mimic Flu, the cure is apparently to either buy a Mimic OR already have one.