I think TNT purposefully tried to bring their prices down. They gave them out in keyquest and in recent plots have made it far easier to get Faerie and Pirate paint brushes and morphing potions.
I thing you can win them at this daily (like pirate DE): http://www.neopets.com/pirates/forgottenshore.phtml
I believe because they are given out through kq, Forgotten Shore Daily, plots, and other things, making them more common. :|