Depends on how you value it (what method of valuation you use) and what assumptions you make. It's difficult to do because our most recent valuation and numbers from the PFS are 4-5 years old. Prices of metals, the size of the project, the cost of mining etc. have all changed a lot and becomes very difficult to actually value currently (within in a realistic range) added to the fact that even outside of that different approaches will lead to different numbers, and simple assumption differences changes the value of the project greatly.

Here's some articles of some methods you may want to look at (don't have to do the calculations yourself, but by understanding how the valuation methods are done you can understand why it's difficult to come to an actual number that's "fair value").

Discounted Cash Flow/Net Asset Value (DCF/NAV):
http://www.ey.com/CA/en/Newsroom/PR-activities/Articles/2010-CMJ-Mining-Valuation

Net Present Value/Internal Rate of Return/Payback Period (NPV/IRR/PB):
http://www.investopedia.com/articles/financial-theory/11/corporate-project-valuation-methods.asp#axzz2CIwtuJ37

Comparison of different valuation methods:
http://www.stockhouse.com/natural-resources-news/2008/may/20/mining-company-valuations-not-all-created-equal.aspx

The only thing that we really know for sure is that we're 99.9% worth more than what we're trading for currently, and what that value is will be defined by the BFS and that value will also be unlocked with Teck's backin decision or fully realized with a buyout from Teck or another suitor.