Ok, the Icesilk Poison Glands, they are good for making the poison potion but they aren't worth anything to NPCs. So if your not really into making "Major Poison Resist Potions" for a living then they become worthless and you have to drop them. Most other "quest" items sell for at least something or they don't drop (often), if your not doing the quest.
So i was thinking their value could maybe go up. Or it could be like with the crystal vials and sleeping powder where you trade say 20 glands to Kay for a already made Major Poison Resist Potion. Something like that.
Anyway, just a thought.