Some items in the catalog, especially parts, can be marked for deletion. An item is marked for deletion because it has either items for sale or items in orders tied to it and therefore cannot be deleted from the catalog right away. Once there are no more items for sale or items in orders tied to the catalog item, the item is purged from the catalog manually by a Catalog Administrator.
Item Marked for Deletion Restrictions:
On a rare occasion it may be discovered that a set in the catalog has not been released. If there is no proof of existence, the set is deleted from the catalog. If there is an image of that set, the set is not marked for deletion but is instead flagged as unreleased. In addition to having all the restrictions that an item marked for deletion item has, unreleased sets do not show in catalog search and browse results.