In theory, it should go around the price of inferno and higher. Take a look at this, we know all beta will be returning (and I'm pretty sure staff costume will be back as well, and staff will replace their costumes with something exclusive just for them). Inferno, is handed on games and events, and even if more members keep joining VMK, there is still a way to get it. Instead, Tomorrowland 8/9 was sold just once, very long ago, and nobody has begged yavn to bring it back, that's why, there no chance it will be rereleased anytime soon, and it is not available for new members in other way than trading. This means that more people join, and these pins are getting harder to find. You should also take into account permanently banned people who had this pin, people that quit the game and had the pin, and some few exceptions of people who sell them by mistake, which makes them even appear in a smallest amount. Sooner or later, everyone will be realizing that Tomorrowland 8/9 might be the rarest pin, even compared to Best Guest and Best Game. You can't trade those 2, but you have chances of getting it, in fact, if you design a very cool room and get it in the popular list for 3 or 4 weeks you will certainly get it, because staff aim at that, popular, entertaining and well designed rooms.