Kalphite (Poisonous) & Malevolent (Shadow) are no longer tradeable this is due to Economy-PK wanting to make them unique and add a new feature available for players. Talk to 'The Raptor' at home and he can upgrade your regular versions of equipment to a stronger version mentioned above for a price. For Donors this also occurs to your Ancient Ceremonial armor that is dropped by Kal'Ger the Warmonger. Giving your items to The Raptor means your giving away your ability to trade them, meaning they will become non-tradeable as stated above. Talk to 'Santa' at home for Upgrade tokens in order to purchase upgraded variants.