Add inventory
Connect eBay, upload a CSV, or enter cards manually. Non-eBay sellers can still use the full platform.
Built for modern card dealers
Run your sports card business from one clean system.
CardFlowOS helps dealers track inventory, sales channels, labels, locations, COGS, grading, comps, consignment, purchases, and card show workflows without juggling disconnected spreadsheets.
eBay connectionCSV importCard Show ModeAI decision support
Limited Founding Dealer spots available during early launch.
CardFlowOS1,842Inventory Items
7Sales Workflows
42Cards Pulled
$3,280Monthly Sales
Box → Row → SKU → Sale
eBay active listing importReady
WhatNot / CollX / Mercari trackingManual
Card Show checkoutFast
Most dealers do not sell in just one place.
One card might be listed on eBay, pulled for a show, sold in person, tracked for WhatNot, marked for grading, consigned for another seller, or bought as part of a collection. CardFlowOS keeps those workflows organized around the physical card, not just a marketplace listing.
Dealer workflow
From intake to sale, keep the card moving.
Organize and label
Assign SKUs, boxes, rows, showcases, carry cases, and print barcode/location labels for faster pulling.
Sell anywhere
Record eBay, card show, Mercari, WhatNot, CollX, cash, and other sales with clear platform tracking.
Track performance
Monitor COGS, gross profit, transaction history, purchase records, aging, grading ROI, and inventory movement.
Use cases
Built around real dealer scenarios.
eBay Dealer
Connect eBay, preview active listings, import inventory, keep eBay listing records separate from physical card inventory, and track sales history.
Non-eBay Seller
Upload a CSV or add inventory manually. You do not need an eBay store to use locations, labels, pricing, sales, grading, and profit tools.
Card Show Seller
Use Card Show Mode to search inventory, build a sale cart, record payment method, and keep inventory updated after the show.
Multi-Channel Dealer
Use platform flags and manual sale workflows to track WhatNot, CollX, Mercari, card shows, and cash deals in one organized system.
Grading-Focused Dealer
Track grading candidates, submissions, expected grade, actual grade, cert number, slab notes, gem rate, and grading ROI.
Collection Buyer
Use purchase history and cost allocation now, with a Dealer Acquisition Portal planned for seller intake, collection review, and acquisition workflows.
Marketplace + manual tracking
Connect where possible. Track everything else cleanly.
CardFlowOS connects with eBay and supports manual tracking for WhatNot, CollX, Mercari, card shows, cash sales, and other selling workflows.
✓ eBay active listing import and listing links
✓ CSV import for non-eBay inventory
✓ Manual tracking for WhatNot, CollX, and Mercari
✓ Card show, cash, and other sale workflows
✓ Platform flags tied back to inventory records
Core operating system
More than inventory. A full dealer workflow foundation.
CardFlowOS is being built around the jobs dealers actually repeat: buying, organizing, pricing, grading, selling, consigning, reporting, and reviewing performance.
Inventory, labels, and locations
Track physical cards with SKUs, quantities, cost, listed price, comp value, storage location, platform flags, and label workflows.
AI Comp Engine
Research raw and graded market ranges faster, review comp history, and apply AI comp results only when you choose.
AI Grade Assistant
Use front/back photos for grading pre-screen support, including centering, corners, edges, surface, confidence, and review history.
Grading Pipeline
Move cards from pulled to prep, sent, returned, or do-not-grade while tracking cert numbers, grades, costs, value, and ROI.
Consignment Module
Separate owned and consigned inventory, track consignors and batches, record sales, create statements, and track payout status.
Advanced Analytics
Review sales, platform performance, inventory velocity, comp health, grading results, card show activity, and consignment performance.
AI decision support
Use AI to move faster without giving up control.
AI tools help reduce repetitive research and grading guesswork, but they stay tied to clear user decisions. Manual values, comp sources, grading notes, and inventory updates remain controlled by the dealer.
Important AI note
AI Grade Assistant is decision support only and does not guarantee PSA, BGS, SGC, CGC, or other grading results.
AI Comp Engine is market research support only and does not guarantee sale price, market value, or future performance.
Limited Founding Dealer spots
Choose your launch plan.
Founding Dealer Pricing is limited during early launch. The current plan is to keep your founding rate while your subscription remains active.
Hobby
$9.99/moBasic inventory, sales, labels, locations, purchase tracking, and access to AI tools through purchased credits.
Start HobbyHobby Pro
$19.99/moFor active sellers who need eBay tools, card show workflows, grading pipeline tools, and included AI credits.
Start Hobby ProCore dealer tier
Dealer
$39.99/moFor dealers managing inventory, shows, grading, seller submissions, consignment, and stronger dealer workflows.
Start DealerDealer Pro
Starting at$89.99/moFor high-volume dealers, shops, expanded limits, advanced analytics, and future team/shop workflows.
Start Dealer ProQuestions before subscribing? Sign up from the plan that fits best now. Account billing can be managed after signup through the billing portal.
Founder-led rollout
Built by a card seller solving a real dealer problem.
CardFlowOS is being built by Matt Gallman, a full-time first responder and sports card seller, to solve the inventory, grading, consignment, and card show workflow problems dealers deal with every week.
Built for dealer growth
- eBay import plus CSV/manual inventory paths
- Platform tracking for card shows, WhatNot, CollX, Mercari, and cash sales
- Labels, locations, COGS, transactions, and profit visibility
- AI comp research, AI grade review, grading pipeline, and ROI tracking
- Seller Submission and Dealer Acquisition workflows planned for deeper seller intake
FAQ
Common questions before signing up.
Do I need an eBay store to use CardFlowOS?
No. You can start by importing a CSV file or adding inventory manually. eBay sellers can also connect eBay to import active listings.
Does CardFlowOS integrate with WhatNot, CollX, or Mercari?
CardFlowOS connects with eBay and supports manual tracking for WhatNot, CollX, Mercari, card shows, cash sales, and other selling workflows.
Can I track card show sales?
Yes. Card Show Mode helps you search inventory, build a sale cart, record payment method, and keep sale history organized.
Can I import inventory from a spreadsheet?
Yes. CSV import gives non-eBay sellers and spreadsheet users a clean way to start using CardFlowOS.
Can I print labels?
Yes. CardFlowOS supports SKU labels and location labels for boxes, rows, showcases, and carry cases.
Does CardFlowOS track profit?
Yes. CardFlowOS can track COGS, sale history, purchase records, gross profit, aging, grading ROI, and related dealer metrics.
Does AI Grade Assistant guarantee grades?
No. It is decision support only. It can help review photos and organize grading notes, but it does not guarantee official grading results.
Does AI Comp Engine guarantee values?
No. It supports market research and comp review, but it does not guarantee sale prices, market values, or future performance.
Can card shops use CardFlowOS with employees?
Single-user accounts are the launch priority. CardFlowOS is being built with future shop/team workflows in mind, including employee access and permissions.
Can I manage consignment?
Yes. Dealer-level workflows include consignment inventory separation, consignors, batches, sales records, statements, and manual payout tracking.
What is the Dealer Acquisition Portal?
The Dealer Acquisition Portal is a planned CardFlowOS workflow for seller intake, collection review, acquisition tracking, and dealer buying operations.
What is Founding Dealer Pricing?
Founding Dealer Pricing is limited early-launch pricing for a limited number of subscribers. The current plan is to keep the founding rate while the subscription remains active.
Start building your dealer operating system
Choose a plan and start organizing your inventory today.
Built from real dealer workflows — inventory, grading, comps, consignment, card show sales, and performance tracking in one operating system.