I have two pictures that I am trying to see what they are worth. The first one is called Christina's World and is print #2773. This picture is about 18" X 24". The second picture is called Fish Cove and #5602G. This picture is 24" X 48". Someone told me that both are valuable and I'd like to know what they would be worth. Thanking you in advance for any help you can give me. Kathy Chandler