They're not listed in the shops, and from what I understand, they're worth quite a lot, but how much? I'm looking to price one of my own, but I want to know- how much is it usually sold for?

They are just glitched in the shop search. Without it being glitched, even knowing that you need them for the avatar, I would estimate their value around 10k. With them being unsearchable, people usually can get around 50k - 100k from them.

the last time i checked they were worth about 200k

Oh, okay, thanks guys. :)