Guide
Knowing what your competitors charge is step one of pricing well — but on eBay the lowest comparable price changes constantly, so a number you checked this morning may be wrong by lunch. Most sellers either spot-check a few listings by hand or ignore competitor prices entirely until sales dry up. Neither scales. This guide covers how to track competitor prices on eBay properly, the difference between a manual snapshot and continuous competitor-low tracking, and the part most guides skip: how that tracking data should actually drive a repricing decision rather than just sitting in a spreadsheet.
The manual method is familiar: search your item, sort by lowest price plus shipping, note the cheapest comparable listing, and decide whether to adjust. It works for a handful of items checked occasionally. It breaks down on two axes at once — volume and freshness. Across a few hundred listings you can't check them all often enough, and even the ones you do check go stale within hours as competitors move. You end up with a spreadsheet that's perpetually out of date and a nagging sense that you're leaving sales on the table. The information isn't wrong; it's just old by the time you act on it.
The alternative is to track the lowest comparable price continuously and automatically. Instead of you checking, a system polls the live market on a schedule and records the competitor low for each of your listings, building a history rather than a single snapshot. That history is valuable on its own — you can see whether an item's market is trending down (time to be more aggressive) or holding firm (no need to discount) — but its real power is that it can feed pricing decisions in real time instead of waiting for you to read a report. Continuous tracking turns competitor price from something you look up into something your prices respond to automatically.
Tracking data only pays off when it drives action. Worked example: your listing sits at $60, your floor is $54, and continuous tracking shows the competitor low just dropped from $62 to $58. A manual workflow means you eventually notice and edit to $57.99. An automated workflow means the moment the competitor-low reading updates to $58, your price moves to $57.99 — above your $54 floor, so still profitable — without you touching anything. If the competitor low instead dropped to $51 (below your $54 floor), the system holds you at $54 rather than chasing a loss. The tracking and the decision are the same loop, closed automatically.
Undercut treats tracking and repricing as one system. It reads the lowest comparable competitor for each listing, records it, and immediately uses it to reprice — undercutting down to the price you set and never below your floor. You see the latest competitor low right next to each listing in the dashboard, so the data that drove the price is visible, not hidden. On both Pro and Scale the cycle runs every 15 minutes, which is how often the tracking-and-decision loop closes. You get the competitor intelligence and the action it implies in the same place, instead of maintaining a tracking spreadsheet on one screen and editing prices on another.
Let Undercut read the market and reprice to win, never below your floor — start a 14-day no-card trial.
Start freeDrop your email — we'll send early access and founding pricing.
What's the best way to track competitor prices on eBay?
For a few items, manually sorting by lowest price plus shipping is fine. For real inventory, continuous automated tracking of the competitor low per listing is the only approach that stays current — and it's most useful when it feeds your repricing directly rather than a spreadsheet.
Why isn't a price-tracking spreadsheet enough?
Because it's stale the moment you finish it and it doesn't act. Competitor prices move within hours, so a spreadsheet you update manually is always behind. Tracking only pays off when the data drives a pricing decision automatically and in real time.
Does competitor-low history actually matter?
Yes. A history shows whether an item's market is trending down — signaling you can afford to be more aggressive toward your floor — or holding firm, where discounting just gives away margin. A single snapshot can't show that direction.
How does tracking turn into a price change safely?
When the tracked competitor low updates, Undercut undercuts down to it — but never below your hard floor. So a falling competitor price moves you only as far as it's still profitable, and a competitor pricing below your floor leaves you holding at the floor instead of chasing a loss.
Can I see the competitor data behind a price change?
Yes. The latest competitor low is shown next to each listing in the dashboard, so the data that drove the price is visible rather than hidden. Tracking and repricing live in the same place instead of separate tools.
Related: Free eBay price checker · How eBay Best Match works · How to reprice eBay listings · How to set an eBay price floor · eBay profit calculator · Undercut plans & pricing