It would be great to get an early $8 public offer to set the cat among the pigeons, but $12 and upwards is my guesstimate, after PEA. I guess it depends upon competition between suitors.
Isn't it prescient to discover a large recource of graphite just as the world makes large scale moves to electric hybrids which require it. Although the full car market is not there yet, if the graphite is suitable, then the resource will only become more valuable with time to the purchaser.
I know its just one avenue of product use, but its remarkable how things just align in history sometimes. Here's a link to review of the new maclaren, which uses the new F1 technology
http://www.topgear.com/uk/photos/Exclusive-Clarkson-drives-the-McLaren-P1-2013-12-09
and here is some blurb on the new cars 'powertrain' as they call the combination engine and motor
http://www.bbc.co.uk/sport/0/formula1/25158104