How to check product demand before listing on eBay, using sold data and Amazon signals

How do you check product demand before listing?

To check product demand before listing, look for evidence that buyers are buying the item on eBay now, at a price that leaves you a profit. The most direct evidence is eBay's own sales data: sold listings, and Terapeak in Seller Hub. Then set that against supply, meaning how many other sellers are listing the same thing. A product that sells often, at a workable price, with a manageable number of competitors, is worth testing.

Amazon can tell you a product is popular on Amazon, which is a useful lead. It cannot tell you how the product sells on eBay, where buyers, prices and competition differ. This guide sets out each check in order, with a worked example and the warning signs that should stop you listing.

What do eBay sold listings tell you?

Sold listings show items that actually sold, and at what price, which is better evidence than active listings or asking prices.

1. Search eBay for the product the way a buyer would, using the brand and model or the main product words.
2. Apply the Sold items filter in the search filters, so only completed sales appear.
3. Count recent sales. Look at how many sold over the last few weeks, and how evenly they are spread. Steady sales across several sellers are a better sign than a burst from one.
4. Open a few multi-quantity listings. A listing selling many units shows how many have sold on the listing itself, which the search results can understate.
5. Note the sold prices, including postage. Your price needs to sit near the middle of that range, not above it.

How does Terapeak help?

Terapeak is eBay's research tool, found in the Research section of Seller Hub. It shows sales over a longer period than a quick search and summarises them: total items sold, average sold price, the number of listings and the sell-through rate. You can also see how sales move through the year, which reveals seasonal products. Our guide to Terapeak product research walks through the screens.

Use the date range to compare recent months with the same months last year. A product that sold well last December but barely sells now may be seasonal or past its peak.

What is sell-through rate and what should you look for?

Sell-through rate is the share of listings that sold in a period: sold listings divided by all listings, sold and unsold, for the same search. A high rate means buyers are absorbing the supply. A low rate means many sellers are waiting for few buyers, and a new listing will be competing for scarce sales. Our guide to the eBay sell-through rate explains how to calculate and read it.

No single figure marks a good product, because categories differ. Compare products within the same category, and treat a rate that is falling month on month as a warning, whatever its level.

What can Amazon tell you about demand?

Amazon gives several signals that a product sells there:

• Best Sellers Rank. Shown in the product details, it ranks the product within an Amazon category. A lower number means it sells more than most products in that category, but it is relative and can change quickly.
• Sales notes. Some Amazon pages show a note about how many units were bought recently.
• Reviews. A steady flow of recent reviews suggests ongoing sales; a large but old review count may not.
• Several offers. Many sellers on one product page can mean strong demand, or a crowded, low-price market.

Treat these as a lead. A product that sells well on Amazon may sell poorly on eBay, where buyers often look for different things, and the reverse happens too. Always confirm with eBay sold data before you list.

If you research products on Amazon, keep eBay's rule in mind. eBay's drop shipping policy says dropshipping from a wholesale supplier is allowed, but listing an item on eBay and then buying it from another retailer or marketplace that ships directly to your buyer is not allowed. The wording is on eBay UK's drop shipping page, and the seller stays responsible for delivery and buyer satisfaction whatever the source.

What does a demand check look like in practice?

Example (hypothetical numbers): you are considering a stainless steel lunch box.

Every line points the same way: steady demand, a price that works and a clear season. The next step is a small test, not a large listing push.

How do you weigh competition against price?

Demand on its own is only half the picture. Ten sales a week shared between two sellers is a better opening than fifty shared between a hundred. Look at who is selling and how:

• Count the sellers with recent sales, not just the listings. One seller with ten listings is still one competitor.
• Look at their feedback and delivery terms. If every seller with sales offers fast delivery and free returns, you will need to match them.
• Check where the sales happen in the price range. If most sales cluster at the bottom, buyers are choosing on price and margins will be thin.
• Look for gaps. Poor photos, missing item specifics or vague titles among the competition are openings for a better listing.

A product with moderate demand and weak listings from rivals can be a better choice than a best seller where every listing is already excellent.

How often should you re-check demand?

Demand moves. A product that passed your checks in spring may look different by autumn. Re-check sold data for your listed products every few months, and sooner for anything that has stopped selling. For seasonal products, check a few weeks before the season starts, so your listings are live when buyers begin searching, and again as it ends, so you are not left with prices set for peak demand.

Which red flags should stop you listing?

• One seller makes most of the sales. That seller may have a price or a reputation you cannot match.
• Sales only happen below your cost. Demand at a price you cannot reach is not demand for you.
• A sudden spike. A trend can fade before your listings gain traction.
• Lots of listings, few sales. A falling sell-through rate means a crowded market.
• A brand that removes listings. Check whether the brand owner reports listings through eBay's VeRO programme before you invest time in it.
• Strong Amazon signals with no eBay sales. eBay buyers may simply not look for it there.

How do you test demand with real listings?

Research narrows the field; a test settles it. List a small number of products that passed your checks, with complete titles, item specifics and good photos. eBay's Best Match guidance names relevance, listing quality and completeness, price and terms such as returns and handling time among the factors that decide where a listing appears.

Give the test a few weeks, then look at impressions, views, watchers and sales. Views without sales point to price, photos or postage rather than demand; our guide to eBay views but no sales covers how to tell which. For a complete research routine that starts on Amazon, see how to find Amazon products that sell on eBay.

A checklist before you list a new product

• Sold listings show steady recent sales across several sellers.
• The sold price range leaves you a profit after fees and postage.
• Terapeak shows whether the product is seasonal and when it peaks.
• The sell-through rate is steady or rising, not falling.
• The brand has been checked for VeRO reports.
• Your supply route follows eBay's drop shipping policy.
• You will start with a small test and review it after a few weeks.