Whatever you want that's 3* or lower, and I'll find it and I will be willing to trade it for crowns.

Prices:

Weapons and gear:
3*= 18 000 cr
2*= 6000 cr
1*= 1200 cr

Materials:
3*= 10 cr
2*= 6 cr
1*= 2 cr

List: angelic helm, crystal bomb, shard bomb, dark matter bomb, rock salt bomb, super crystal bomb, brandish, wrench wand, demo helm, and more.