Hugh,
Another great Amazon tool isn’t really Amazon at all. To determine whether today’s price is the best price, copy the item’s URL and go to camelcamelcamel.com. There, you’ll be able to see a historical chart of the item’s price and set up a notification when the item reaches the price you’re comfortable with (not only on Amazon but with third party sellers as well, if you’re so inclined).
Camelcamelcamel.com is a great tool, if you don’t need to buy it today, for those items that may be more costly and in your budget at a lower price. – Dayzymom