20,000 gems for an endless copper mine?!
That's £75 of real money. £75!
Insane.
Seriously... someone with some perspective at BB take a step back and look at about £75 or 100 Euros of REAL money as a value for a copper mine, no matter that it's 'endless'.
I wouldn't pay £75 for a game, never mind a small element of a game.
You are off your heads.
Great game mind.