Ah, here is something I think we all have experienced, you found some random object, sell it and forget about it, later you have a quest for that exact same object, then you have to run all the way back and buy it back or you forgot where you even sold/put it! I know this might break imersion a bit, but I think once you get a quest item, even if you are not aware of it, you cannot get rid of it, it should probably go into a special section in your inventory and weigh nothing. At least that is what I think, what does everyone else think?

When did this last happen? 1993? Most RPG are very sticky with their quest items.