how to buy gold juniors

First you need real patience!
This is what I did and I'm very happy with my shares:-
Check:
What grade of gold?
How many ounces are inferred, indicated or measured?
Are there enough ounces to attract a major buyer?
What is the estimated cash cost of getting the gold out of the ground into ingots?
Can it be open cut mined?
What is the exploration cost on average of finding each ounce - $5? $50?
If the company were not able to raise another cent of funding in the next two years how long would the current funds last?
Who is running the company and what is their track record?
Who are the major shareholders?
How tightly are the shares held?
Could the company be subject to a hostile takeover?
Finally remember you are in for the long haul but you can get exceedingly rich very quickly provided you don't lose your nerve.
Don't forget to make a large donation to a charity.
Any other ideas are most welcome