Finding AGGlad I could be of help. Anything can happen (price to cash flow wise) as things get pessimist or optimistic but this is just what I have picked up from studying it for a few years --geeky hobby. Something else that might help is
price to earnings can be alot higher than price to cash flow depending on their exploration spending and development work. I'm a numbers guy (an actuary who has worked on valuations of a different nature for years) but I don't have alot of mining knowledge (learned a hell of a lot the HARD way as with most things in my life it seems but still alive and thankful).
Have a great weekend.