Use code GET3MP3S at Amazon to get a $3 MP3 credit added to your account! There are many discounted albums, including several Christmas albums. Michael Buble's Let It Snow album is only $1.99... making it absolutely free after the credit. I went with The 99 Most Essential Christmas Masterpieces for $1.99 as I figured it was more Christmas music bang for my free buck (and we enjoy orchestral Christmas songs).
Thanks, Maven of Savin'!