How to Track Prices and Use Price History to Buy at the Lowest Price
To buy at the lowest price, paste a product's webpage URL into a price tracker, read its price history curve to find the typical and lowest prices, then set a drop alert at your target price and wait for the notification instead of buying on impulse. This works best for products that restock or discount repeatedly — courses, apps, electronics, and fashion — and less well for one-off or made-to-order items that never change price.
Step 1: Find the product page URL
Open the product on the retailer's site and copy the full URL from the address bar. Use the exact product page, not a search results or category page — a tracker needs a single item to follow.
Glassit's tracker list covers retailers including Amazon, Walmart, Target, Best Buy, Costco, Home Depot, Lowe's, IKEA, Nike, Etsy, Udemy, Google Play, and the App Store, among others. If your retailer is on that list, the tool can usually read its prices directly.
Step 2: Look up the price history
Paste the URL into the price history checker and open the result. You get a chart of past prices plus a lowest-price record. On Glassit, each tracked item also shows its current price against the original list price — for example, The Complete Full-Stack Web Development Bootcamp is listed at $124.99 and currently $28.34, while The Complete JavaScript Course 2024 is $199.99 down to $112.40.
Read three numbers before deciding:
- Lowest recorded price — the floor the item has actually hit.
- Average price — what it normally sells for, so you can tell a real discount from a small wobble.
- Current price — where it sits today.
If the current price is near the lowest recorded price, buying now is reasonable. If it's close to the average, waiting for a drop is usually the better move.
Step 3: Set a drop or restock alert
Enter your target price and turn on the alert. The tracker watches the page and notifies you when the price falls to that level or when an out-of-stock item returns. This removes the need to check manually and prevents buying at a mid-range price out of impatience.
Set the target slightly above the lowest recorded price rather than exactly at it — items often sell out at their absolute floor before you can react.
Step 4: Judge the discount, not the percentage
A "64% off" tag means little on its own. Compare the current price to the item's own history:
| Signal | What it means | Action |
|---|---|---|
| Current price near lowest recorded | Genuine low | Buy |
| Current price near average | Normal pricing | Wait for an alert |
| Price rose shortly before the "sale" | Inflated reference price | Ignore the discount, compare to history |
| Price flat for months | No real discount cycle | Buy when you need it |
The last two rows are the common traps. A discount is only real if the pre-sale price matches what the item actually sold for in the weeks before.
Step 5: Build a tracking list and review it
Add every product you're considering to one list, then check the recent price drops. Glassit surfaces drops from the last 30 and 90 days, which is useful for spotting seasonal patterns — for instance, whether a course or a phone model tends to fall at a particular time of year. Reviewing the list weekly is enough; daily checking adds no information for most products.
When this approach doesn't pay off
Price tracking helps most when an item discounts repeatedly and stays in stock. It helps least when:
- The item is limited-edition or sells out permanently at full price.
- The retailer isn't supported by your tracker, so no history exists.
- You need the item immediately — a possible future drop is worth less than having it now.
In those cases, buy when your need outweighs the potential saving, and treat the history as context rather than a reason to wait indefinitely.