Terapeak Product Research: How to Find Proven eBay Winners in 2026

eBay's regular sold-listings search shows the last 90 days. Terapeak product research, now called Product research inside Seller Hub, shows up to 3 years of eBay sales data. That longer window is the main reason to open it before you list anything, because it shows what buyers paid across several seasons rather than one quarter. This guide covers where the tool lives in 2026, which filters narrow a search, how to read the numbers it returns, a worked example, what to do once the data says an item sells, and when a Terapeak alternative is worth adding.

• It is free on eBay.com. Since April 2021 eBay has included Terapeak Product Research for all Seller Hub sellers at no extra cost. Sourcing insights, a separate tool, comes with a Basic Store subscription or above.
• Three years of sold data, against the 90 days a completed-listings search covers.
• Filters do most of the work: category, condition, seller location, buyer location and sale price range.
• Demand data only. The tool tells you what sold and for how much. It does not tell you who supplies the item or at what cost.

On this page: Where it lives · The filters · Reading the numbers · A worked example · Where it stops · Doing it in Ecomli · Alternatives · FAQ

Where Terapeak Product Research Lives in 2026

Most of the confusion is about the name. Terapeak was an independent research service that sellers paid for until eBay bought the Toronto-based company in December 2017 (eBay's announcement), which is why older threads from 2016 and 2017 are full of sellers asking for a Terapeak alternative. eBay folded the tool into Seller Hub and, from April 2021, made Terapeak Product Research free for every Seller Hub seller. eBay's current help page simply calls it Product research, while sellers and forums still say Terapeak. They are the same tool.

On desktop, open Seller Hub, select the Research tab and choose Product research. eBay also offers it in its mobile apps, which is handy for checking a sold price while you are standing in front of stock. Rules differ by eBay site. On eBay Australia, product research tools are only available to Pro sellers, so check your own site's help page before you plan around it.

One point to settle before you search: this is sold data. Every figure describes a transaction that completed, including the actual price when a Best Offer was accepted. An active listing at $30 tells you what one seller hopes to get. Three years of sold records tell you what buyers agreed to pay. For the wider set of options around it, our roundup of eBay product research tools covers where the free tool ends and paid platforms begin, and our explainer on what Terapeak is covers the basics.

The Filters That Turn Raw Data Into a Shortlist

A bare keyword search returns a blur. eBay lets you filter by category, item condition, brand, color, buyer and seller location, eBay marketplace, sale price range, listing format and product codes such as MPN, UPC, EPID, EAN and ISBN. Five of those carry most of the weight.

1. Category. Set it first. "Case" returns phone cases, guitar cases and watch cases in one pile, and choosing a category also unlocks filters specific to it, such as model or color.
2. Condition. New and used items behave like two markets with two price curves. Mixing them produces an average sold price that describes nothing real.
3. Seller location. This is the filter most people skip and the one that changes conclusions most. Filtering to sellers in your own country shows what buyers pay for faster local delivery, while leaving it open blends in long-transit listings priced lower.
4. Buyer location. It confirms the demand sits where you can deliver, and it shows whether opening a listing to international buyers is worth the effort.
5. Sale price range. Trim the tails. A single sale far above the typical price can drag an average up and make a thin niche look healthy.

Two habits make the filters pay off. First, change the date range on purpose. eBay allows anything from one day to 3 years, so run the same search over the full window and again over the last 90 days. If demand held steady in both, it is structural. If the recent window is much weaker, the category is cooling, whatever the long average says. Second, use search logic. Put a minus sign or "AND NOT" in front of a word to exclude it, and put "OR" between variants inside brackets to cover both, so "insulated bottle -lid" drops spare lids from a bottle search.

Search narrow. "Pet supplies" is a category. "Portable dog water bottle" is a query, and it returns results where every row is roughly the same object, which is the only condition under which an average means anything. The eBay product research guide walks through the full workflow from niche to listing, and our eBay advanced search guide covers the free 90-day view that sits alongside it.

How to Read What Terapeak Product Research Shows You

Product research calculates a set of metrics for whatever your filtered search returns: sales trends, average sales price, sold price range, average shipping cost and the number of listings offering free shipping, sell-through rate, total sellers and the selling format. These are the ones that change decisions, with the trap inside each.

Read the metrics together. A high average price with two sellers and eleven sales in a year is a category too thin to build on. A moderate price with steady volume, a crowd of sellers and a flat or rising trend is a working market you can enter on execution.

Sell-through rate deserves extra care because people often quote it without the sale count behind it. eBay sets no official benchmark, so compare an item's rate with similar items in the same category, and check how many sales sit behind the percentage before you trust it.

Total sellers is the number people read backwards. An empty category feels like an open goal. More often nobody sells the item because nobody buys it, or because it cannot be shipped at a profit. Competition is evidence that money changes hands. What you want is enough sellers to prove the market and enough spread in their sold prices to suggest nobody has fully optimized the listing. Uniform prices across many sellers usually mean a mature market competing on cost alone, which is the hardest kind to enter from a standing start.

Look at the wording inside the top sold listings too. Phrases that repeat across listings that sell are the phrases buyers search for, and our breakdown of how eBay's Cassini search engine ranks listings explains why title wording moves placement.

A Worked Example: From Search Box to Sourcing Decision

Take a seller weighing a 32 oz insulated stainless steel bottle with a straw lid. The figures below illustrate the method. They are not real results for that product.

Step one: narrow the query. Search the exact configuration instead of "water bottle." Set the category, choose New, and filter seller location to your own country.

Step two: read the shape of the result. Suppose the last 90 days show an average sold price of $30, a sell-through rate around 50%, a few hundred units sold and dozens of sellers. That reads as a real market, with enough volume to matter, enough competition to confirm demand, and listings that move rather than age.

Step three: do the margin math before you get attached. On a $30 sale, eBay's final value fee in most categories is 13.6% of the total, or $4.08, plus a $0.40 per-order fee on orders over $10 (eBay selling fees). That is $4.48 in fees, leaving $25.52. If a supplier can deliver the bottle to your buyer for $15, you keep about $10.52 before tax and returns, which is a workable spread. If the landed cost is $24, you keep $1.52, and the category is real but this item is not worth listing. eBay charges its percentage on the total the buyer pays, including shipping and sales tax, so the true fee runs slightly higher.

Step four: check the trend before committing. An insulated bottle heading into summer is a different proposition in February than in September. Use the trend line to time a listing as well as to approve a product.

Step five: find who supplies it. This is where the free tool goes quiet and most research sessions stall. You know the item sells at $30 with steady sell-through. You still do not know which supplier can land it for $15, or whether that price will hold next month.

Where Terapeak Stops and Your Sourcing Starts

Terapeak product research answers one question well: what has sold, and for how much. It is not built for the two questions that follow, and that is how sellers end up with a validated shortlist and no path to stock.

The first gap is supply. Knowing an item sells does not tell you where to buy it, at what cost, or whether it is available. Sourcing insights, included with a Basic Store subscription or above, adds category views such as categories with high demand and low inventory on eBay, but neither tool matches an item to a supplier or a cost.

The second gap is time. A research session is a snapshot. Supplier prices move and stock runs out, which is how a listing validated at a $15 cost quietly becomes a listing sold at a loss. Research tells you what to list. Something else has to keep the listing in line with the supplier after it goes live.

How to Do This in Ecomli

Ecomli is a non-API browser extension for eBay dropshippers that works through the eBay seller account signed in to your desktop Chrome browser, so there is no API connection to authorize. It approaches research from the supply end, so the demand check and the supplier match happen in one pass. Here is the workflow, using the feature names in the app.

1. Start from a seller who already sells. In Product Hunting, research an eBay seller's sold history or current listings. Ecomli matches those products to Amazon or AliExpress, so each row arrives with a possible supplier attached. You can also search Amazon keywords, Best Sellers, category, brand or store pages, or paste an AliExpress store link to collect its products.
2. Filter the matches. Narrow by price, keywords, reviews and ratings, Amazon FBA or AliExpress Choice. Rows that Safety Shield flags for brand or restricted-item risk are blocked. Save a hunt and resume it later, or export it to CSV.
3. Check the demand in Terapeak. Take the shortlist into Product research and run the filters above. A match in Ecomli is a lead to check rather than proof of profit, and three years of sold data is a sound way to check it.
4. Send picks to Create Listings. Picks go straight to the lister, and "Clone" hands a matched competitor listing across. Ecomli prices each item with your markup, writes optional AI titles and descriptions from supplier facts, applies your description template, runs Safety Shield and duplicate checks, and fills eBay's listing form in your seller session.
5. Keep the margin you calculated. Stock Monitoring checks Amazon and AliExpress stock and prices for your Ecomli listings and updates eBay price and quantity, or ends out-of-stock items, using your rules. If a supplier read fails, the listing is held unchanged instead of being ended.

Product Hunting, Create Listings and Stock Monitoring run in your browser while it is open, so plan on regular check-ins. The homepage shows how the automated workflow fits together. Every plan includes Product Hunting and unlimited active listings, with plans from $29 a month for 1,000 monthly product imports, and you can compare Starter, Pro and Scale to see what each one adds. eBay's own selling limits still apply as you grow, and our guide to how eBay selling limits work explains how to raise them.

When You Need a Terapeak Alternative

Terapeak is free and covers three years, so most eBay.com sellers should keep using it. There are three common reasons to look for a Terapeak alternative as well, and each points to a different kind of tool.

• You need suppliers as well as demand. This is where Ecomli fits, and it is our pick for eBay dropshippers who source from Amazon or AliExpress. Ecomli makes it, so weigh that. Product Hunting pairs sold-history research with supplier matching, and the same extension lists the products and keeps them in line with supplier stock.
• You want deeper competitor research. ZIK Analytics is a dedicated research suite whose eBay tools include Competitor Research, Product Explorer, a Keyword Tool and supplier price comparison. Our guide to ZIK Analytics alternatives compares it with similar tools.
• You flip and want quick sold comps. Resellbot sells research plans for eBay sold comps: Research at $39 a month with up to 30 days of sales history, Research Pro at $79 with up to 90 days, and Research Volume at $149 with up to 365 days (prices as of Sep 2026).

For a side-by-side view, see our comparison of Terapeak alternatives worth considering and our roundup of eBay product research tools compared. If you would rather start from categories with a track record than a blank search box, the guides to the most profitable items to sell on eBay and the most sold products on eBay are quicker starting points.

Frequently Asked Questions

Is Terapeak product research free in 2026?

On eBay.com, yes. eBay has included Product research in Seller Hub at no extra cost for all Seller Hub sellers since April 2021. Sourcing insights is the exception, and it comes with a Basic Store subscription or above. Other eBay sites set their own rules. eBay Australia, for example, limits product research tools to Pro sellers.

Does eBay still use Terapeak?

Yes. eBay bought Terapeak in December 2017 and runs it today as Product research, in the Seller Hub Research tab and in the eBay mobile apps. eBay's own help page uses the Product research name, while most sellers still call it Terapeak.

How far back does Terapeak product research data go?

Up to 3 years. A completed-listings search in normal eBay search only covers items that sold in the previous 90 days, so Terapeak shows seasonal patterns that a single quarter hides. You can set any date range from one day to 3 years.

Why doesn't Terapeak show a sell-through rate for my search?

eBay only calculates sell-through rate for searches of items sold 90 days ago or less. Set the date range to the last 90 days or shorter and the rate appears.

Can I use Terapeak product research on the eBay mobile app?

Yes. eBay offers Product research in its mobile apps as well as in the Seller Hub Research tab. The app suits quick checks, such as confirming a sold price while you source in person, and the desktop version is easier for building filtered searches and comparing date ranges.

Does Terapeak show me which supplier to buy from?

No. It reports what sold on eBay and at what price. It holds no supplier catalog, landed costs or supplier stock levels. Ecomli covers that step: Product Hunting matches products to Amazon and AliExpress suppliers, Create Listings lists them, and Stock Monitoring keeps eBay price and quantity in line with the supplier by your rules.

What is the best product research tool for eBay?

For eBay dropshippers who source from Amazon or AliExpress, our pick is Ecomli, because Product Hunting pairs sold-history research with supplier matching and the same extension lists and monitors the products. Ecomli makes it and publishes this blog, so weigh that. Terapeak stays the free way to check three years of eBay sales data, and the two work well together.

Who is eBay's biggest competitor?

For most sellers the answer is Amazon, the other general marketplace where buyers can find the same products. Walmart Marketplace, Etsy and Facebook Marketplace compete in narrower ways. Ecomli works with eBay as the selling channel and uses Amazon and AliExpress as suppliers.

Find a product, let Ecomli draft the AI title and description, and publish it to eBay from your own browser — no API connection needed. Create your Ecomli account → Plans from $29/month · 7-day money-back guarantee.