Minecraft wiki entry for Trading, associated text: This profession is mainly useful for purchasing ender pearls, as well as bottles o' enchanting to raise your experience level, or as a portable experience storage. In addition, it allows you to trade away rotten flesh that has probably been either accumulating in your chests or thrown out. It is a little hard to level up, as aside from the flesh, it buys hard to obtain items, but this profession is still useful nonetheless. They are also one of the only renewable sources of lapis lazuli, but a 1:1 ratio of exchange makes it highly expensive.