Graded cards. Packs, market and vault in one place.
Open packs of PSA‑graded Pokémon, One Piece and sports cards with published odds, trade them on a fee‑free marketplace, and ship any card home from the vault. Paid from the same USDC balance as everything else on OpenSea.
Packs
OpenSea's own tier ladder on Collector Crypt machines. Odds per machine, live.
After the pull, three equal choices.
Decide on the result screen, or later from your vault.
Keep it vaulted
Stays insured in the vault and tradeable on the marketplace at 0% OpenSea fee (Collector Crypt takes 2% from the seller).
Free · InsuredSell it back
85% of insured value, paid in OpenSea credit within the 72‑hour window. Cash payout available at a lower rate.
85% · 72 hoursShip it home
Redeem the token and Collector Crypt ships the physical slab. $5.99 for the first card, $3.00 each additional (US).
From $5.99Odds you can check.
Every machine publishes its rarity weights, and every pull is drawn with verifiable randomness you can audit after the fact. The expected value is stated as a share of the ticket price on the same screen as the buy button — not in a footnote.
| Tier | Insured value | Odds | In machine |
|---|---|---|---|
| Common | $15 – $45 | 62% | 1,284 |
| Uncommon | $45 – $120 | 25% | 412 |
| Rare | $120 – $400 | 10% | 96 |
| Epic | $400 – $2,000 | 2.5% | 21 |
| Legendary | $2,000+ | 0.5% | 4 |
Built for the rules, not around them.
Odds and EV on the buy screen. Buyback denominated in platform credit by default, cash as a separate lower option. Age gate, per‑user spend limits and a geographic eligibility check that runs before the surface renders.
- Provable randomness with post‑hoc verification on every result
- Self‑service daily spend limit, on by default
- Buyback on insured value — the number is fixed before you open
Questions
Who holds the card?
Collector Crypt. Every pack maps to a specific PSA‑graded slab in its insured vault; the token on OpenSea is a 1:1 claim on that slab, and redeeming burns it.
What is the buyback based on?
Collector Crypt's insured value for the card, not a live market price. 85% of that number in OpenSea credit (80% in cash) for 72 hours after the pull — stated on the pack page before you buy.
What does OpenSea earn?
OpenSea's tier ladder is priced for a 93% EV machine; the difference funds the draw, the buyback floor and OpenSea's margin. The marketplace itself charges 0% — Collector Crypt takes 2% from the seller.
Is this live?
No — a working concept demo. Draws run in your browser against the published odds; buybacks, listings and shipping update a sandbox balance.