CGC Integration
Enabling instant listing creation and richer buyer trust for graded comics.
Raremarq's entry into the premium CGC Signature Series marketplace.
The Gap in Graded Comic Listings
Raremarq was expanding into CGC-graded slabs, but the listing experience was manual, metadata-heavy, and visually underwhelming.
This is the metadata fields the current sellers need to fill out. We want to make that process easier.
If graded slabs are premium assets, the product experience must reflect that premium status.
Make Graded Listings Instant and Trust-Driven
Instead of manual input, we reimagined the entire flow:
Seller Flow: Before (Manual Entry)
Seller Flow: After (Automated)
Seller wants to list CGC slab
Visits raremarq.com/cgc
Enters CGC Certification ID
System pulls CGC data
Auto-populates metadata
Seller reviews listing
Publishes in seconds
Structuring Trust Through UI
1. Metadata Hierarchy
I grouped and structured fields to create clear visual priority:
- High-impact fields (Grade, Label Type, Page Quality) surfaced prominently
- Supporting fields placed in structured grid layout
- Notes visually separated for readability
2. Visual Emphasis on Grade
Grade became a focal visual anchor:
CGC Implementation Wireframes
Low-Fidelity Wireframes
Early exploration of the CGC lookup flow, focusing on the core user journey of entering a certification number and creating a listing instantly.
Low-Fidelity CGC Detail Page
Initial wireframe exploring the layout and information hierarchy for displaying CGC collectible details before creating a listing.
Low-Fidelity Example Listings
Early wireframe exploration for displaying CGC listings in a grid format, showing how multiple graded comics would appear in the marketplace browse experience.
Live Auction Page
This wireframe shows how CGC details are prominently displayed on the live auction page, with structured metadata clearly visible to buyers during active bidding.
Landing Page
The CGC landing page provides a streamlined entry point where sellers can instantly look up their CGC certification number and create a listing in seconds.
CGC Detail Page
The detail page displays all CGC collectible information in a structured, scannable format, allowing sellers to review auto-populated data before creating their listing.
See It In Action
Watch how the CGC integration works in practice, from entering a certification number to creating a complete listing.
Reducing Friction to Seconds
The seller flow was designed for speed and simplicity:
Impact
- • Reduced input time dramatically
- • Increased graded slab supply
- • Encouraged collectors to test listing
From Feature to Market Expansion
This feature marked Raremarq's official entry into the CGC Signature Series marketplace, launching with the Ronin Club Collectibles Kickoff Slab Sale.
45K
Users
30K
Monthly Pageviews
2.3K
Listings in a Month
What Success Looked Like
Measurable goals we tracked:
Key Metric
CGC listings grew from ~600 to 2.3K in a month after implementation, demonstrating strong seller adoption and platform growth.
What I Learned
- • Premium categories require premium UI treatment
- • Metadata is not just data — it's a trust signal
- • Structured information architecture directly impacts conversion