The guys at pyroCPU (sister site to Phoronix) have done some digging & found that the OEM provider for the Das Keyboard is selling a keyboard that's almost exactly the same for a fraction of the price. Weighted keys & everything...

"The Das Keyboard has caught the sights of many computer gamers and enthusiasts thanks in part to its individually weighted keys and the keys being literally blank. However, what the interested folks haven't been able to bear is the incredibly high price at which the Das Keyboard sells ($79.95 USD)."