So why? Well, based on how much space it seems to cover and the value of a comparable real-world castle in Wales, the Keep winds up with a fairly modest price tag for a castle. Then again, there's only one accessible floor, and as we mentioned it does have a bit of a problem with dragons. (Exterminators can never really get all the eggs out.) So if you find yourself transported to Azeroth with $10 million that becomes the equivalent in gold, you can walk up and... well... not buy it, because it's not for sale. But you'd know how much it was worth.