At first glance, it may seem strange to use the words bargain and gold in the same sentence. However, the distinction lies not in the shiny yellow metal but rather in the observation that the mining firms operating in this space have not traded at such low valuations since the Lehman induced panic of the financial crisis during late 2008...The rally in the gold- and silver-mining companies that followed that bottom was the most spectacular of this entire bull market. There is one final, but crucial caveat here for investors: the major distinction between the large-cap miners and the junior miners producing in this sector. This will come in the conclusion of the series. Follow @bullionbulls This article was written by an independent contributor, separate from TheStreet's regular news coverage.