This is a great price for Final Fantasy XI for the Xbox 360 - cheapest I have seen it yet! It is £14.89 delivered from sendit.com, and it seems to be about £18 at all the other online stores.
Details: Explore the living online world of Vana'diel in FINAL FANTASY® XI. The Rise of the Zilart and Chains of Promathia expansion packs provide fifteen unique jobs and hundreds of areas. Frequent updates and events add to the award-winning visuals, innovative gameplay, and deep story line of the world-renowned FINAL FANTASY series.