1）这个案例合法不？
Yes, the county can foreclose the house based on unpaid taxes. But the county has no interest or expense to foreclose houses, the county ONLY want its tax payment. So the county sold the tax lien to investers, who receives right to foreclose the house if the home owner doesn't pay back taxes.
2）B黄世仁和C地产奸商的做法合理不？
Yes, see above.
3）杨白劳怎样才能拿回自己的土地房产？
He can pay the tax lien held by C地产奸商 to avoid foreclosure, if he doesn't pay the tax lien held by C地产奸商, then the house can be foreclosed and he can be evicted.
4）从中我们吸取到什么教训？
There are only two things that are certain in life, Death and Taxes.
