I saw this offer in Fatwallet, you can download Coldplay - Parachutes album for free for a limited time in Amazon. It is a good album to have in our collections.
Also, the following albums:
Depeche Mode - Violator
David Bowie - The Rise and Fall of Ziggy Stardust and the Spiders from Mars
Damien Rice - O
Death Cab for Cutie - Plans