Fansite, quest related and unpickable items cannot be put on the market all the rest must apear appear or will take a little time to be put on the market, some items have been put on market after they have gotten out, also i I can recall some items that doesnt apear doesn't appear in market like vial of mana fluid, vial of life fluid or any container that have those liquids, masterpiece paintings of the event in the aniversary anniversary of 15 years of tibia, the ravens after they have been open up for the first time, they apear appear on market but once you open it for the first time it wont let you put it on market