Step 1: Buy Goblinol for 10 poetics
Step 2: Sell Goblinol for 64 gil

Can also buy unidentified ore, trade for Thanalan soil and sell that on the marketboard if you'll get 960 gil or better per piece.

The fiddliness of going through all those boxes is unlikely to be worth all the effort when you can get a steady trickle of money far more simply. Plus it's completely killed the market for all of the less rare minions that used to be worth something.