Value of Porcelain Dolls?

I just came across two beautiful porcelain dolls that my mom currently owns and we're trying to find their value. If anyone could help me find out more info don't hesitate to leave a comment! The Bette porcelain doll is a musical doll. Her name is Maxine Twinkle and her music box plays "Twinkle, Twinkle Little Star". The other one didn't have a tag so I'm not sure of her name or what she does, but she does have a golden heart shape locket on with a flower in the center and a tiny heart engraved on the top left of the locket.