If you have a house you can get some empities empty backpacks and put retrieve on itens items that you got more quantite quantity and store them on house.
another trick is put items that you have in a big quantity for a high price on market so no one will buy like with a bigger price than rashid/djiin rashid/djiinn would pay, for example i I had 1k titan axe on depot and put them for 6k each to free space.