The Mordor Expansion Pack is on sale in the in-game store for 1996 LP (regular price 2495 LP). This is the first time it has been discounted.
This is different from the Mordor Expansions (Standard, Collector's or Ultimate Fan Editions) in the LOTRO Market for cash. It has all the content (quests, instances, and the raid), but does not include the Aria of Valar, High Elf Class, cosmetics, titles, or other things included in the those bundles.
The sale runs though Sunday, September 30.