Amazon has a not so secret anymore, 30 day money back guarantee. Slate and several other sources have posted about Amazon’s customer service policy. Slate gives a phone number to call
1-800-201-7575; to get a human right away, dial extension 7–"ask him about that 30-day price guarantee.
Basically, Amazon will refund the difference between the price you paid and the lower price on its own website within 30 days of the purchase. A third party website makes it easy to track these price declines. Refund Please needs your ISBN# or ASIN# (if it is not a book), the price you paid, the date, and your email and it will track the item for you.
Via Reader Susan.