Merchants come here to size up the items and decide the prices they will pay. It is the best place to let merchants know what one has to sell and when they will sell. However, it is full of traps, and highly valuable items can end up being greatly undervalued, as in the case of Gon and Killua's jewelry. The organizer of the market is Koneruto.
The Preview Market isn't shown in the 2011 anime.