How to track Amazon prices and get price-drop alerts

Why do Amazon prices change so often?

Prices on Amazon move with demand, stock, competing sellers and sale events. The same item can change price several times in a week, which is why one look at today’s price says little about whether it is a good time to buy.

How do I read a price history?

1. Find the usual price: where the line spends most of its time.
2. Find the recent low: the lowest point in the last few months.
3. Compare today’s price with both. Close to the low is a good buy; above the usual price is a reason to wait.

A spike right before a sale is a warning sign: the “discount” may be smaller than it looks. More on that in how to tell if a deal is real.

How do I set a price-drop alert?

1. Open the product on On Sale Spot.
2. Tap Price alert, or save the item with the heart icon.
3. Sign in so we know where to send the alert.
4. Get an email, or a push notification in the app, when the price drops.

When is the best time to buy?

Buy when the price is at or near its recent low and you need the item. Big sale events like Black Friday and Cyber Monday push many prices down at once, so alerts are especially useful from mid-November. See Amazon Black Friday 2026 for this year’s dates.

Can a price drop after I buy?

Yes. If it drops within the return window, check Amazon’s help pages for that item’s return policy: returning and buying again is sometimes an option, but policies vary by item and seller.