For resellers and flippers
Know what it sold for before you buy it
Thrift store, estate sale, storage auction — you have seconds to decide. Grail hands you cleaned eBay sold comps on the spot, so “iPhone” means the phone, not a case, a charger, and three cracked screens.
The problem
Raw comps lie by mixing in junk
- —eBay's sold filter caps out fast and buries the condition, shipping, and offer details you actually need.
- —A raw search for a phone, console, camera, or watch pulls in cases, chargers, empty boxes, and repair parts.
- —Averaging ten listings in your head at a garage sale is slow and error-prone.
- —Copy-pasting prices into a spreadsheet item by item eats the margin you came for.
How it works
From keyword to data in three steps
- 01
Send the keyword
One GET request with your item, exactly how you would type it into eBay. Add price, condition, or date filters to narrow it.
- 02
We clean the sold listings
We fetch real completed sales, then remove accessories, parts, wrong models, and other matches that should not shape your price.
- 03
You price with confidence
Get up to 240 cleaned comps as JSON. Use the median, spot the condition premium, and set your buy price in seconds.
Example
One request. Real sold prices back.
Search “vintage lego galaxy explorer” and get up to 240 completed sales, cleaned before you use the median. Every row carries provenance — the source listing and when we saw it.
Built to make this job faster
Decide from a cleaner median
The median is calculated after cleanup, so bad matches do not quietly push your buy price too high or too low.
See the condition premium
Every comp carries its condition label, so you can tell a complete boxed set apart from a loose lot at a glance.
Shipping-inclusive totals
Sold price and shipping come separate, so your margin math reflects what buyers actually paid.
Price a whole cart at once
Loop your finds through the batch endpoint and get a valuation for every item without a single manual search.
More ways to use Grail
Start free — 100 requests a month.
No credit card. Your own key in the dashboard in under a minute.
Create free account