"IMO say it's 3-4 billion for a large low cost advanced multi-metal project in Canada with huge exploration potential. 
25% interest gets us around 750million to 1billion"

Thats if we can get 100% of fair value NAV.

EE and ES will try to get as close to 100% of that value but might have to meet Teck in the middle.

could be as low as 50% of true value or 75% or 85%.
Using the middle of those numbers assuming 850M (100% nav):

We could see 425 million sale at 50% nav (not likely their plan as company wants close to full nav)

We could see 550 million at 65% nav (possible)

We could see 630 million at 75% nav (more likely)

We could see 720 million at 85% nav (better)

And if EE really wants full value after his 15 year wait...we get 100% nav for best buyout price.

This is where the discussions will take the longest to figure out and agree to. Deciding what % of nav for 25% interest we deserve in a sale agreement. All this assumes total value of 3-4 billion of SC.