Poland 2 zlote Y#306

Hello...
Could you please help me to grade this coin?

These are its values on 2015 SCWC:
XF40    MS60    MS63
125$    175$     250$.
Does anyone know why it's so valuable?
Thank you in advance

I'd say XF

No idea why it should cost that much.

many collectors are looking for 2 ZL. commemorative coins to complete their collection . Low mintage