Keep all you find
Keep everything that is found until you can absolutely cheap wonderland online Gold confirms it has no use. I had the misfortune to throw out all of my refining stones in the beginning Poets zone, thinking I did not need them. I was definitely wrong. Some items start minibuses if clicked on twice, for free experience and money. There only disposable items are the useless gray - named monster drops, but have a high sell value so keep them until you go into town. So expand your cube if you think you do not have room, but keep all you find.