I’m VERY new to collecting book ends and being a “rookie” I don’t want to make “rookie” mistakes. I have many Bradley Hubbards and others with no makers mark. I bought the “no marks” just to have more in my collection and thought maybe they can be valuable or I could use in trading. I can tell these are old, but without a mark, I’m not sure how to place value? For example, one is “girl at well” nice patina but no mark?