I bought this in a region where only palace worker live. The woman who sold me the Keris told me that the people bring the Keris to her, cause they are afraid of the mystic in the Keris. The people have to do special rituals to take care of the Keris. Some old palace workers or family members who intend the Keris don't want to do this. So the people bring their Keris to her cause she and her father can free the Keris of the spirit.
The woman has a lot of Keris. They are all stored in an old broken wardrobe. My wife is from indonesia too. She don't like if I buy Keris cause she is afraid of the mystic too.
Ya, that's the indonesian culture.