I agree: "not a good time to buy a mine"
However, it is a great time to CREATE a mine. Capital expenditures will be relatively cheaper. If prices stay low for 1-2 years from now that would be a perfect situation for Teck to develop a mine in a safe jurisdiction while they wait for all the permits to be approved and line up all the labour and materials needed to start a mine, which would go into production a few years from now.
Presumably, the mine will come into production during higher prices (long-term).
The companies that are hurting now are the ones that began construction on a new mine during the higher prices 2-3 years ago. And now they have to sell their production into a falling market.
CUU has good timing to create a producing mine for Teck.