Just wanted to post a reminder now that we are seeing Amazon dropping the prices of so many items. Keep checking becuase I have reclaimed money on 7 items already in the last couple of days.
Basically if the price is reduced within 30 days you send them a message and they refund you the difference. Simple and easy with no fuss from them.
Click on Help, find the order, highlight the items and click Contact Amazon - then just type in the prices and away you go.
Make sure the price you are seeing now is Amazon and not a marketplace seller though...