Sir... you have made your point. Repeating it 3 times does not help, particularly when you are completely ignoring the points being made back to you.
We all knew we could simply not buy the mine right from the start. The point I and others have been making is that the pricing is completely out of proportion to other items of similar value within the game.
I know you want to think this is just kids whining, but it wasn't from the start and still isn't. So, unless you have something more useful to contribute than "don't buy one", I think you'll find your value to this thread is less than the value most of us are currently placing on the endless copper mine.