There is no trading community in Japan anymore. At least not sanctioned by Disney.
And the majority of the pins when released are lost to the public, and even worse, most pins are about 5,000 made or MUCH less.
When there is a big set like an alphabet set given as prizes the pool, say it was 10,000 gets split among that set, so that's a little less then making the pins LE 400. These pins are given away as a part of games so anyone can get them, mom dad, people who really don't care. So most end up in the general publics hands, thrown away or in collectors collections because there is no trading community. So I'll be generous and say each pin becomes on it's own about an LE 100 or worse.
And it is much much much worse for pins that came out 2-3 years ago because people there now can see they can sell a mojority of them but then when the advent of pin trading was less about buying most just vanished.