A while back I did a quest from the DE Village (I think) and I got all these echo crystals - I've seen some people selling them for around 25k and i'm just wondering what are they and why would someone want to buy them? I've done a couple searches but all I could find was that they were part of the christmas festival and were used to make a tree but that's about it. No real details. Please tell me they are really worth that much :D
People sell them for way too much. I'd pay no more than 1k for them, and that's pushing it. They cost 200 adena to produce, if you have the music sheet.