It is becoming buyable... but 50-100K is somewhat high.
We build this up... and a better reason: there aren't many players whith that amount of gold. The price should be something every player can pay, since we build this farm, doing dailies and stuff.
Yes, you can find the blue post here: http://blue.mmo-champion.com/topic/2...es-january-17/
Blizzard didn't mention a price though... that was a players here thinking that.
It is unknown what Blizzard will decide as price.... I am assuming all players will get the chance since they worked for increasing the farm.
They also plan to have rep gained through the farm...... so they have quite some improvement-plans for it, once it is player-owned.