https://www.everquest.com/news/tempting-treasures-eq-dec-2019
Finally from December 27, 2019 at 12 PM PST (Noon) through January 3, 2020 at 12 PM PST (Noon) it's a 30% sale off all marketplace items for members (Replaces current bonus for members does not stack) and +50% Rare Spawns!