The rulebook says when you use a search item, flip the card over and keep it in your play area. Does that mean that search items never go back into the search deck once they get used? If so, wouldn't that mean that the heroes could hoard search items, causing the search deck to be only a couple of cards?
Also, I didn't see anying regarding when the used item card is "unflipped." Do you unflip the card between encounters or between quests?