This trick is only useful late on Disc 2, when you gain control over the YggDrasil on the world map. Instead of hunting Croaker tribes and Tusk-Tusks to earn money late in the game, an alternate is to visit Big Joe's shop under the lighthouse. Big Joe is surrounded by four chests which appear and regenerate each time you enter the shop. Usually, these chests contain useless items such as Spider Webs, Radishes, Elfananas, etc., or obsolete items such as Aquasol and Zetasol. However, occasionally they contain items such as Eyeballs, Fangs, Scales and Ivory (very rare). It also is not that unusual to find weapons, usually Matchlocks, which sell for a reasonable amount of money (6000G). While this does not seem like a good way to make money, it can be much faster (depending on your luck) to enter, collect the contents of the chest, exit, then repeat as opposed to flying to the Anima relic cave, spending time there trying to earn Ivories and Scales, flying to Nortune to sell them, then flying to where you wish to shop at.