My Grandmother passed away and she had around 200 pounds of silver quarters and dimes from back in the day. My uncle is recieving half and my sister and myself are getting 1/4. I am planning on hanging on to mine, but my sister will most likely try to get cash. What is a fair price per ounce to give her or tell her what to try to get? If she deos sell them, what/where is the best place for her to do so?