<p>Check the History of the sell & buy of the items. There is a chance that someone bought or sell sold this item at higher price. It can be also sometimes related to the world event.</p><p>Similar situations happens happen with <img src="https://vignette.wikia.nocookie.net/tibia/images/8/82/Crystal_Rubbish.gif/revision/latest?cb=20121203174144&path-prefix=en" alt="Crystal Rubbish"> Crystal Rubbish" src="https://vignette.wikia.nocookie.net/tibia/images/8/82/Crystal_Rubbish.gif/revision/latest?cb=20121203174144&path-prefix=en"> Crystal Rubbish from the Roshamuul area. </p>