I've seen the forum threads asking this same question (one from 2012, 2013, and 2014) and all point to the same Pathfinder #39 article: The City of the Seven Spears - but that article just raises more questions than answers.
So - in the 3+ years since the juju oracle came out has there been ANYTHING to help clarify how to price juju fetishes?
The Archives of Nethys shows prices for:
Black Blessing (500 gp)
Ganji Doll (16,000 gp)
Ganji Doll, Greater (36,000 gp)
Laubo Powder (2,800 gp)
Spirit Tear (1,800 gp)
/cevah