He himself has a warehouse with an estimated half a million dollars of unsellable wool.

他自己有一个仓库，里面估计有50万美元的不出。

And they have learned how to handle diseases better, reducing the quantity of fish that ends up being unsellable.

而且他们会了怎么控制鱼类的疾病，从而减少了最后无法出的鱼的数量。