Find the known examples. Reach the people who have them.
Most rare slabs never come up for sale. Known Atlas lets collectors privately reach the owners of specific graded coins and cards, and lets owners hear only the offers worth hearing.
Concierge pilot, starting in the UK. Free to join.
An entry in the atlas
1916-D Mercury Dime
PCGS · MS65 FB
- Verified holders
- 3
- Hunters looking
- 17
- Owner identities
- Never shown
How it works
Owners stay in control of what reaches them. Hunters finally have a way in.
For owners
Claim the slabs you own
Add a slab by its grader and cert number, then verify it with a quick photo that shows a one-time code. Nothing is reachable until you opt in.
Set a silent ask
Tell us the price you would sell at. Only you ever see it.
Hear only serious offers
Offers at or above your silent ask reach you straight away. Everything else waits quietly in a weekly summary.
See how wanted your items are
Know how many hunters are looking for each item, even if you never sell.
For hunters
Add your wants
Pick the coins and cards you are hunting, with the graders and minimum grades you accept.
See what is reachable
Each catalog page shows how many verified examples have owners on Known Atlas.
Make a binding offer
Offer on a specific example. The owner can accept, decline or counter.
We handle the introduction
During the pilot our concierge team coordinates every accepted deal.
What stays private
Known Atlas exists to make rare items reachable without making their owners visible.
- Anonymous by default
- Others see a handle at most. Owner identities are never revealed before a deal.
- Counts, not collections
- Public pages show how many examples are reachable, never who holds them or where.
- Photos scrubbed
- Location and camera data is removed from every verification photo, and those photos are never public.
- No meetups
- Deals never involve meeting in person. Items travel by insured shipping.
- We never hold your money
- Known Atlas does not hold buyers' funds. Payment goes directly to the seller or through a regulated partner.
- Always current
- Owners regularly re-confirm they still hold an item, so the atlas never goes stale.
Join the waitlist
We are starting with a small concierge pilot in the UK. Tell us a little about yourself and we will be in touch personally.
Questions
Which items are supported?
Graded coins from PCGS and NGC, and graded cards from PSA, CGC, BGS and SGC. Every item is identified by its grader and certification number. We are also measuring demand for CGS UK.
Does joining cost anything?
No. Joining the waitlist and the pilot is free.
Will anyone know what I own?
No. We only ever show counts, such as how many verified examples of an item are reachable. Your identity and your collection stay private.
Is this a marketplace?
Not in the usual sense. Nothing is listed for sale. Owners decide privately which offers they want to hear, and nothing happens without their agreement.
Where is Known Atlas available?
The pilot starts in the UK, with offers in GBP, USD and EUR.