Amazon's Groupon-style daily deals site, AmazonLocal, is offering a $10 Amazon.com gift card for $5 — not a huge amount, but if you were planning to buy something from Amazon, it's basically a discount coupon. To get the deal, you'll need to go to AmazonLocal, select a location if you're not already signed up, and purchase a card by 3am EST on March 21st. The sale is limited to one card per household; the gift card doesn't expire and can be used for Amazon.com (but not AmazonLocal) purchases. We don't know exactly how many cards are being sold, but there's apparently a "limited quantity available," so you'll want to jump on this sooner rather than later. Unfortunately, people outside the US are out of luck: the cards can't be redeemed through Amazon.co.uk, Amazon.de, or other international sites.