$3 to spend on Amazon.com MP3s for free!
All you do is "buy" it (for free) on that page, then a moment later it emails you and you get the code, and it directs you where to enter it on Amazon.
This AmazonLocal thing is handy. First it was the $5 for $10 on Amazon, now free $3!
Looking at the Amazon MP3 store there are plenty of things for $3 or less!