Yes, Kuja's right. And too elaborate, each monster has two items that can be earned from poaching them, one common and one rare. I don't know if there are tricks to helping you poach the rarer item(like lowering your brave for items found with Move-Find Item) but each time you poach a monster, an item is placed for sale on the fur trader's shelf. So if you poach ten of the same enemy, chances are that you'll get ten of the common item(potion for instance) rather than the rare.

Does anyone know if there is a way to better your chances of gaining the rare items when poaching(like lowering your brave)?