Trying to find value of these two lamps from the 20's to 40's

These two small table lamps were given to me by my mother before she passed away and belonged to her mother or my grandmother and are
somewhere from the 1920's to 1940's. Don't know for sure if they were
first purchased by my grandmother or greatgrandmother. They are
in good working condition and even still have the tiny cord and plug that they used in earlier years. One has a round base and one has a square base and there is only 1 flaw on one shade there it has a peace chipped out.
I am just wanting to know if these lamps have any value and if so what that would be. Don't know who to go to to have these checked out.