I only see a few in the shop, and they're all priced pretty high. Could anyone tell me if it's worth my price (800,000)?
I honestly wouldn't even bother selling them XD People can always get them from the quests so they usually don't want to waste 800k on a shard they can get for much cheaper.
I'd finish Shinwa's quest if I were you.
Actually, it's not. See, you do a Shinwa quest, she asks you to go to a different person to do a quest and as a reward you'll get a Shard or . They are only useful for the Shinwa Quest, for nothing else. Some people are collecting them, but that's the only other thing you can do with it. I don't think anyone will buy it for more then 10k (that's what most people try to spent on one Shard, meaning on one of the 5 quests).