kachina dolls

I rescued these three kachina dolls from a yard sale; stuck into a shoebox for $1.00; all of them. The arm on the middle one is missing but the other two are survivors of an abusive family. All are signed. Not a collecter of Native American Art but do feel some items deserve conservation. One is dated 1994 so I am guessing they are not a high value item, but that is no reason to abuse them. Some young Native American worked hard creating these pieces of art history. Unknown artist, tribal affiliation or art school. Any clues?