The Mithril Edition is now on sale at 75% off. This is a very good price, and the Mithril Edition is good to have. It is disc (2 disc-set, if I remember correctly), of several parts of LOTRO. It does not contain all parts of those regions included, but it does contain quite a bit of material. It is very handy to have, and if needing to reload the computer after a disaster, this will save massive amounts of download time. It is always good to keep backups on hand.
Below is the article about the sale and what is included in the Mithril Edition.
http://lotroplayers.com/2014/11/27/mithril-edition-currently-75-off/