How colcur works
colcur is a search engine over certified coin listings on eBay USA — coins graded and sealed in a holder (a “slab”) by PCGS, NGC, ANACS or ICG. Type a coin and a grade, or paste a certification number, and find every live eBay USA listing of exactly that.
Today's index is limited to eBay USA. Listings from other eBay marketplaces are not included yet, even when the same coin is available internationally.
We read the barcode, not the picture
For each listing we read the grading service's own certification barcode off the slab in the seller's photo. The identity you see — grader, certificate number, grade, date, mint — is that decoded certificate, the same number you can verify on PCGS's or NGC's own site. We do not look at the coin and guess what it is. The barcode is a fact; a guess is not.
We then match the coin to a catalogue so you can climb its identity (series → date → variety), deep-link to Numista for the full details, and compare the same coin across graders — the same date and grade in a PCGS slab versus an NGC slab, side by side.
What we don't do
- We don't authenticate coins or guarantee a slab is genuine — we read the grader's number, the grader vouches for the coin.
- We don't host the seller's photos. To see the coin, we send you to the eBay listing, where the image is current.
- We don't set or guarantee prices. The price shown is eBay's current asking price.
How we make money
colcur is free. When you click through to eBay and buy, eBay pays us a small commission through the eBay Partner Network. It never changes the price you pay, and it never changes which listings we show you.
colcur earns a commission when you buy on eBay through our links — it never changes your price. Every listing opens on eBay USA; other marketplaces are not indexed yet.