Timothy Noah for Slate Magazine has a great post-holiday spending article about Amazon’s secret price guarantee.
If you have purchased anything from Amazon.com in the last 30 days (Amazon themselves, not an affiliated merchant) and the price is now lower, they’ll refund that amount to you. Call Amazon at 1-800-201-7575 and dial 7 right away to get to an operator. Ask her about Amazon’s 30-day price guarantee. Have your Amazon order number handy too. If you get an uncooperative (or hard to understand) operator, just hang up and call right back.