There was also an Essence of the Firelord, which was part of Thunderfury's quest materials. Lu Li directly assigned this to Azure Sea Breeze. The other rare materials were quite exquisite, and Lu Li kept them all for himself. Even if he didn't know how to use the rare materials, he wouldn't sell them. The Ruling Sword Auction House sold everything, but they didn't sell rare materials because Lu Li knew that any rare material's value was constantly on the rise.
If there was someone who had a bunch of gold coins on hand and didn't know what to do with them, what should they do? Wood Fearing had once given an answer to this in an interview. The answer was either to buy some equipment to make yourself stronger, as strength directly corresponded with gains, or just buy some rare materials to store in the warehouse.
