Well, we wont lose a single crafting material, weapon, armor, or buff in selling them to the vendor!!!!Because what one kinmember cannot use, another can, or can be sured for future use, or sold as a bulk material. It is such a waste!

For your consideration:

Scholar material a kinmember recieves in a drop for killing a mob fetched him or her 2 or 3 silver a piece. Howvere if we collect them they can be turned into power and morale buffs.  The thing which keeps you alive when you are in heavy combat.

Or

The weapon dropped into a kinmembers lap  in a drop for killing a mob fetched him or her 2 or 10 silver a piece. But it may give another  kinshipmember a huge boost.

Or

Criticals which means nothing to a kinmember, such as rushlight candle, dim candle, can mean the difference between 1 or 3 items result when crafting, or a better, stronger item.