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ThisorThat

The provably fair card marketplace where you pick your price through games. Everyone gets a card. Every flip is cryptographically verified.

Browse Cards How It Works
Provably Fair $15 min · One shipment Provably Fair
Early Access

Currently featuring cards from SlabTrack — our verified seller with 100% positive eBay feedback. More sellers coming soon.

Sellers: import cards from SlabTrack for the fastest setup, or add cards manually with AI-powered scanning.

LIVE SIMULATION

Watch a flip play out

Card → set your risk → pick THIS or THAT → pay → flip. Switch scenarios below.

CARD
›
RISK
›
PICK
›
PAY
›
FLIP
›
RESULT
›
SHIP
≡ Bundled cart · 3 cards
Justin Fields
Justin Fields
$10
Mac Jones
Mac Jones
$12
Kenny Pickett
Kenny Pickett
$8
CART TOTAL$30
Each card individually under $15 — but combined >$15, so they Flip together as one cart. Win or lose, all 3 ship in one envelope.
SCENARIO 1/4
Bundle flip
RISK / SPREAD5%
5% safe50% high risk
IF WIN
$29
IF LOSE
$32
THIS
THAT
TRY ANOTHER SCENARIO · loading pool…
LIVE PULL SIMULATION

Watch a Pull play out

Build a stack of 2-5 cards → pay one price → server picks one to ship. Provably fair, every outcome is a real card.

STACK
›
PRICE
›
PAY
›
REVEAL
›
WIN
Building Pull stack (0 of 2)
$425
Luka Doncic
Luka Doncic
$18
De'Von Achane
De'Von Achane
Scenario 1/4
Bargain stack
Avg market
$0
You save
−$0
5% off avg
Pull price
$0
+$3 fee
0 cards in this stack · empty
How Pull works: buyer adds 2-5 cards averaging $15+ to a stack. Server picks one randomly via SHA-256 commit-reveal — the OTHER cards stay listed for the next buyer. Cheap singles can play because the AVG floor handles shipping economics, not per-card pricing.
SKIP TO ANOTHER STACK

How You Play

Three ways to buy: Flip the price, Pull a random card from a stack you built, or just buy at market.

🪙

Flip for Your Price

Pick your cards, set your risk, flip the coin. Win = discount. Lose = pay over market. 50/50. Provably fair. You always get the cards.

Win: Save up to 20%Lose: +20% over market
Min $15 cart · All cards ship in one package
✨

Pull One from a Stack

Build a stack of 2-5 cards you'd be happy with. Pay one price (avg market value). Server picks one randomly to ship. Provably fair, every outcome is a real card.

Pay avg − 5%Get 1 of N at random
Min stack avg $15 · 2-5 cards · Cheap singles welcome

Buy at Market

Don't want to flip? No problem. Buy any card or bundle at market value. No risk, no game, just the cards you want at the price you see.

Market priceNo flip required
Same cards · Same shipping · Just pay + go

Trusted Seller

100% positive feedback. 194 items sold. Real cards from a real seller.

SlabTrack
SlabTrack on eBay
100% Positive Feedback · 194 Items Sold
Accuracy
5.0
Shipping
5.0
Ship Cost
4.9
Comms
5.0
“Fast efficient shipping. Well packaged. Just as described. Mint condition. Great value. A+”
silentexpedition · Verified Purchase
“10/10 experience. Great communication, fast shipping, and got exactly what I paid for.”
slabshack02 · Verified Purchase
“Fast shipping. Well packaging. As described. Worth the value. Good quality.”
683salvatore · Verified Purchase
View full eBay profile

Secure Payments

Card charged before the flip. Bank-level security.

💳

Secure Payments

Pay with credit or debit card. Your payment is held before the flip — you're committed, and so are we.

✓
Card charged before the flip
✓
Win = pay less · Lose = pay more · Either way, the card ships
✓
Powered by Stripe — bank-level security
✓
Every outcome cryptographically verified

Live Listings

Cards available right now

Listings coming soon

Cards are being prepared for the marketplace. Check back shortly.

View all listings

How It Works

1

Browse

Find a card you want from verified sellers with transparent pricing.

2

Choose Your Game

Flip, Pick One, or Game Day — each game type has different odds and spreads.

3

Play for Your Price

Make your pick. The result is determined by a pre-committed cryptographic seed.

4

Get Your Card

Win or lose, the card ships to you. You just played for your price.

Every Flip is Provably Fair

We can't rig it. You can prove it. The math is the trust.

🔒

Anchored Before You Pick

The commit hash is written on-chain (Solana) before your pick is accepted. The result is sealed in an immutable public ledger.

🧮

Your Entropy, Our Math

Your browser supplies entropy at commit. The result is SHA-256 of server seed + your client seed. Neither side alone controls the outcome.

⛓

Every Flip, Permanent Proof

Every flip has its own verification URL showing seeds, hash, Solana tx, and outcome. Recompute it in your browser in one click.

View Live Platform Stats
1,247
Cards Listed
4,891
Games Played
$234K
Total Volume
100%
Verified On-Chain

Ready to flip?

Every card ships. Every game is verified. Your price, your pick.

Browse Cards Now