Hearth Essence unsaleable

[DaniAngione]

Yes, this is intentional.

It’s in the patch notes of one of the latest ACE releases:

@DaniAngione

• Earthbud Flowers, Earthbud Flower Seeds and Hearth Essences can no longer be sold to merchants. (We can hear the huge ‘boo!’) The reasoning behind this decision is that not only these items were very easy sources of gold (they are worth a lot!) but also because the poor little bunnies from Amberstone get to befriend you and share their most important secret with you… for you to make a profit out of it? Seriously? Shame on you! (the traders probably don’t even know what to do with the stuff, anyway)

You can find this and all the other notes on that thread