Quest items are usually like keys: they do nothing sitting in your hold, and they aren't really worth selling.
These are items which grant you privileges while in your hold.
Specific Quest Items
|Korolov||1||korolov shipping container||Sellable|
|Black Market||5||sealed container with black markings||-|
|Professor Dall||10||Dall Sphere||Needed for use of the Galactic Map in 1.07a|
|Huari||5||vial of thioseptal||Usable|
|Heretic||1||data ROM labeled "Heretic research"||-|
|Heretic||10||Iocrym cybernetic tower||-|
|Heretic||12||stargate control rod||-|