The numbers they report it doesn't look cheap. And being a generalist investor I can't determine the resources in the ground very well (nor do I want to). What I do look at in companies is the management and directors, and the reported numbers.
Right now all I have is the GBUG active etf (silver and gold miners chosen by pros) and SVM (China connection, profitable, fairly valued, and a dividend). At one time I bought OMAI gold mines just because I liked the connection with another company and that REALLY went up big. But I missed most of the move. The curse of the value investor :-(