They would try for the NPV value plus the remaining value in the JV contract. Waiting any more risks missing the cycle and we'll sit here for another 6 years: https://www.wsj.com/articles/copper-nears-multi-year-low-as-economic-concerns-grow-11566498105  

As long as Teck refuses to say when they intend to develop this property then no buyer will be interested, regardless of how much metal is in the ground.They shouldn't be laughing, they should be embarrassed.