Sports Card Trading Marketplace

The Business Problem

The sports card collecting market has a trust problem. Collectors want to trade valuable cards—sometimes worth thousands of dollars—but existing options are risky. How do you trade 3 Luka Dončić Silver Prizm PSA 10 cards for 3 Zion Williamson Silver PSA 10 cards plus $2,000 cash with a stranger on the internet?

Counterfeits are everywhere. Condition disputes kill deals. And without a trusted intermediary, high-value trades either don't happen or end badly. Collectors were stuck choosing between avoiding the trades they wanted or taking substantial financial risks on informal deals.

How Big0 Solves the Trust Gap

Big0 addresses the core trust deficit by acting as a verified intermediary for every high-value transaction. Our process begins with rigorous authentication: users ship their cards to Big0’s certified grading experts, who verify authenticity and condition against strict standards. This eliminates the "PSA 10" dispute before it starts. Once verified, cards are stored in our insured, climate-controlled vaults. When a trade is initiated—like swapping Luka Dončić Silver Prizms for Zion Williamsons—the platform locks both sides of the deal. Funds and cards are held in escrow until both parties confirm satisfaction. For cash components, Big0 facilitates secure payment processing, ensuring funds transfer only after card authentication. This end-to-end oversight transforms risky peer-to-peer trades into bank-level secure transactions, empowering collectors to trade confidently at any value level.

The Security Infrastructure

Trust isn't just a promise—it's engineered into Big0's infrastructure. Every transaction is protected by multi-layer security protocols that institutional investors expect. Our vault facilities feature 24/7 monitoring, biometric access controls, and comprehensive insurance coverage through Lloyd's of London. Digital security includes bank-grade encryption for all data transmission, two-factor authentication for user accounts, and real-time fraud detection systems. For disputes, Big0 provides binding arbitration through industry experts who understand sports card nuances. The platform maintains transparent audit trails for every card, documenting its journey from submission to final delivery. This creates an immutable record that protects both buyers and sellers. By combining physical security with digital safeguards and expert oversight, Big0 delivers the peace of mind that makes high-stakes sports card trading possible in today's digital marketplace.

The Solution

Big0 built a marketplace that makes complex trades safe and simple.

The key innovation: both parties ship their items to a central verification hub staffed by professional authenticators. Every card is verified for authenticity, condition, and specifications before any exchange happens. Cash components are held in secure escrow. Only after everything checks out does the trade complete.

The platform supports the complex trades collectors actually want to make—multiple cards on each side, cash to balance values, detailed negotiations. Real-time messaging keeps both parties informed throughout. And comprehensive tracking provides complete chain of custody from shipment to delivery.

For collectors, it means they can finally make the trades they've been avoiding. For the market, it means more liquidity and better price discovery.

The Results

The marketplace created something new in the collectibles space: a way to make high-value trades with complete strangers safely. Since launch, not a single fraudulent transaction has completed—the verification process catches problems before they become disputes.

Collectors are making trades they never would have attempted before. Complex multi-card exchanges with cash components that would have been too risky through informal channels now happen routinely.

The model has proven scalable and is expanding into other collectible categories where the same trust problems exist. Anywhere there's value, counterfeits, and strangers who want to trade—the platform solves a real problem.