Make for high Runes a new class, call them "Epic Runes", make them soulbound and finished!
And god damn kick those gold-sellers in their butts to make it impossible that they destroy the balancing like in Diablo 2!!! Blizzard, if you agree that, you even could give away all items for free, it would be the same effect. THE PEPOLE should have to PLAY and FIND their Items and not pay some cheap dollars for any Item with an dropchance of 0.001% that destroys the balancing and make the Game boring.