Are Gold Stocks the Cheapest Ever? -
"While we lack data that precedes 1980, my guess is gold mining stocks relative to cash flow and book value are trading at valuations not seen since 1960 (a secular bottom) or even earlier. In the year 2000 the gold stocks were at the end of their worst cyclical bear market in history (and worst secular bear) and were trading at a 24-year low! Valuations recently surpassed (to the downside) where they were at that epic low."
http://thedailygold.com/are-gold-stocks-the-cheapest-ever/