From the EQ2 Forums:

The prelude to EverQuest II: Chains of Eternity, Sleeper's Tomb, will be released next Tuesday. To prepare for this epic saga, we’re offering a 10% discount on experience potions in the Marketplace! The sale includes Extended Potion of the Advanced, Superior Potion of the Advanced, Greater Potion of the Advanced, Minor Potion of the Advanced, and Potion of Vitality. Stock up now and be ready for next week's exciting event!

Note: Only the Station Cash price of the item will be discounted. The Goblin Gold price remains the same.