Ordinary person: What to do with unused treasures? (On Zhuanzhuan)

I recently had a batch of Qi Refining stage pills lying idle... Now that I've successfully established my Foundation Establishment, these low-grade pills are naturally useless. Everyone, what did you do with your old Qi Refining pills after you switched to Foundation Establishment stage pills? Like my batch of Qi Harmony Powder, I recycled it for over eighty low-grade spirit stones on Zhuanzhuan! If you want to save money, Zhuanzhuan is the place to go! ...I recently got a new top-grade magic weapon. Since I bought a new magic weapon, what should I do with the old one? On Zhuanzhuan! Like my mid-grade Giant Flame Fan and late-stage Qi Refining puppet, I recycled them for hundreds of low-grade spirit stones on Zhuanzhuan. ...Transmigrating to the world of *A Record of a Mortal's Journey to Immortality*, Qin Fang finds himself in the Blood Trial, severely injured! Fortunately, he gets his hands on Zhuanzhuan, a second-hand trading platform! Qin Fang: Is this outrageous? I've tried recycling, now I'll have to check out the purchasing function! Nangong Wan: Huh? Why does my chest suddenly feel cold? At the same time, the several crystal-clear spirit stones in Qin Fang's hand disappeared, replaced by a chest protector. Stunned, Qin Fang stood there, bewildered... Qin Fang: Hiss~ It really works! Qin Fang: Then wouldn't Old Demon Han be my food supply?! Han Li: Achoo~ [Existing work: A Mortal's Journey to Immortality: You have the Heavenly Bottle, I have the Gaode Map! Those interested can check it out.]