From Playonline.com:

The FINAL FANTASY XI ULTIMATE COLLECTION is now available at the sale price of $14.99!
Never before has it been so easy to begin adventuring in Vana'diel. Available for Windows PC and Xbox 360, the collection includes the original game, all four expansions (Rise of the Zilart, Chains of Promathia, Treasures of Aht Urhgan, and Wings of the Goddess) as well as the three add-on scenarios (A Crystalline Prophecy, A Moogle Kupo d'Etat, and A Shantotto Ascension) on one easy-to-install DVD.

Owners of the ULTIMATE COLLECTION are eligible for the Nexus Cape, the in-game bonus gift item awarded to players who have purchased all three add-on scenarios. Don't miss this chance to obtain the most complete compilation of FINAL FANTASY XI to date at a reduced price!

Click here for more details.