Card grading market share tracker
Which grading companies' slabs are reaching the market: the share of graded cards newly listed on eBay each day by PSA, BGS, SGC, CGC and TAG. Updated daily.
The first daily reading is on its way. Check back tomorrow.
How it's measured
Every morning HobbyGM counts the graded trading cards (eBay's "Graded" condition) newly listed on eBay US in the previous 24 hours, then splits them by the grading company named in the title: PSA, BGS or Beckett, SGC, CGC and TAG. Shares are of all newly listed graded cards, so smaller graders make up the rest. Counts come from eBay's own search totals, which are estimates.
This measures slabs reaching the eBay market, which follows grading volume with a lag and leans toward cards people sell rather than keep. For grading volume itself, grading companies' population reports are the source.
The data is free to use with a link to this page, and available as JSON at /api/market/grading-share.
Questions sellers ask
- Which grading company has the biggest market share?
- PSA, by a wide margin: most graded sports cards and card-game cards newly listed on eBay are PSA slabs. The table above shows today's figures.
- How often is this updated?
- Every day, from a fresh count of the previous 24 hours of new eBay listings.
- Can I use this data?
- Yes, with a link to this page. The daily figures are available as JSON at /api/market/grading-share.