Kitco Buy Silver. preference for gold over silver. We may have to restrict trading to existing clients if we continue to see this level of demand." O’Byrne predicts increased coin and bar buying in the coming month. You can choose from different weights, ranging from 1 ounce down to 1/10th ounce (and Kitco even offers 1/20th ounce). May 1, 2015. Don't toss old books when you decide to get a…