Mark B. Ledenbach's vintage Halloween collectibles blog.

Rare Unsigned German Halloween Pumpkin Face Childs' 1 cup china Teapot

Admittedly, it is difficult to make a definitive judgment from the photos associated with this listing, but I suspect that this teapot is of Japanese origin rather than German origin. The dimensions seem a little off, the coloration is quite dark, the knobby surface is typically not as prominent on German items and the expression seems rather flat to me. From my experience, such Japanese pieces are never marked, whereas most German teapots are marked. There is a significant difference in price between German (higher) and Japanese (lower) porcelain pieces from this set. The BIN price of $500 is reasonable if this is a German item, but much too high if it is, in fact, Japanese.