Board Thread:Questions and Answers/@comment-25996581-20150111145507/@comment-113.197.110.202-20150113235438

as for me, there are several easily obtained S class ingredients ( the one you found on pirate island) i would usually extract them and maintain some amount ( eg:5)

whilst in my opinion, i would sell the C grade to A grade ingredients whenever i has more than 5 ! i think it's quite good to help you upgrade your treasures faster. but it is only when you have achieved quite a lot in the game and needs better treasure to win the game