intersting read ran across this technical report and folks may want to have a quick read as it paints a reasonable picture of zinc mining across TVs ,ines..its a little date as was for the 2018 annual report
https://www.miningnewsfeed.com/reports/annual/TrevaliMining_2018_AIF.pdf
it re-inforces the fact that while TV is a "zinc miner' that they could almost be considered a silver miner given how much silver they produce as a by-product of mining zinc.
Also- regardless of the share price and cost of zinc there is value (goodwill plus infrastructure, processes, employees, mining camps, contracts, etc) in the various mines. So value has to be the value of zinc in situ, value of by-product plus the infrastructure. The value of "getting a mine into operations" has to be in the $50 Million plus range, so do the math and if someone buys this for anything under a couple of hundred million, then they should be charged with theft as they will be "stealing" the company from shareholders. Also see how Glencore is going to come out of this mess!
Of course this is only my humble opinion and probably biased at that.