later patches had the feature that you can choose eighter to sell all as bundle or part selling. for example if i want to sell 1000 potions, i can sell them all at once, or players could only buy 20 out of it and the 980 are still inside broker. i think its handy, especially for gathering quest items where you can buy only that amount you need for the quest and not buying 500pcs which you dont need.
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