Track it.Price it.Put it On Deck.
On Deck by MDC gives hobbyists, show sellers, full vendors, and online sellers one place to track, manage, price, stage, sell, trade, and present trading-card inventory.
Who it is for
One system that grows with how you sell.
On Deck is useful before you ever set up a vendor table, but it does not stop being useful when your inventory, sales channels, and show schedule get serious.
Hobbyists
Know what you own, what you paid, where it is, and what it is worth without building a spreadsheet around your collection.
Card-show sellers
Build the exact inventory going to the show, print targets and labels, scan sales, and keep the table moving.
Full vendors
Run raw and graded inventory across Pokémon, One Piece, and sports with collections, search, exports, and sold tracking.
Online and live sellers
Research comps, organize listing data, export sports draft templates, and keep direct, streamed, and online sales tied to inventory.
The difference
Inventory should lead directly to the sale.
Most tools stop after telling you what a card might be worth. On Deck keeps going—from physical tracking and pricing to show prep, customer browsing, deal math, and sold history.
Raw ID, cert, set, number, grade, image, collection, cost, and market stay together.
Compare cost to 90%, 85%, and 80% of market before the negotiation starts.
A read-only QR catalog lets customers search your live table inventory themselves.
Singles, bundles, and trades resolve into sold records instead of disappearing from a list.
Everything in the current build
The complete operating system for your cards.
The landing page now reflects the actual application: inventory, image support, pricing, show prep, public catalog, print tools, sports set data, deal workflows, and sold tracking.
Live Control Center
See raw and graded counts, market, cost, spread, ROI, On Deck value, and daily sales from one mode-aware dashboard.
Combined Sell Insights
Rank raw cards and slabs by realistic margin at 85% or 80% of market, filter the list, and send selected cards directly to On Deck.
Fast Raw and Graded Intake
Create raw IDs, scan grading certs, import CSV data, and connect physical inventory to the card details that matter.
Pokémon Images Built In
Show card images throughout raw, graded, combined inventory, On Deck, and public catalog views so the right card is obvious at a glance.
Collectr-Friendly Workflow
Import Collectr data, build missing raw copies from quantity, link slabs by cert, and refresh markets without losing your own inventory structure.
On Deck Show Prep
Stage only the cards you are selling, override market when needed, and see immediate 90%, 85%, and 80% decision points.
Bundle and Trade Builder
Build multi-card sales or trades, allocate value across outgoing cards, add incoming raw or graded cards, and account for cash paid or received.
QR and Print Center
Generate card labels, custom-logo QR codes, storage labels, a compact catalog label, or a full 8.5 × 11 table sign.
Public Table Catalog
Let customers scan once and browse your current On Deck inventory by name, set, mode, player, or location with market prices only.
Sports Master Checklists
Start with card number, then expose only the matching player, parallel, variation, and serial options from imported modern set data.
Imports, Exports, and Research
Move data by CSV, export sports eBay draft templates, and open mode-appropriate research links for active and sold listings.
Cloud-Based Across Devices
Use the same account on iOS, Android, and web with mode-aware inventory and a read-only demo for a no-risk product walkthrough.
End-to-end workflow
From new inventory to a completed deal.
Every major screen connects to the next action, so your card does not have to be re-entered every time it moves from storage to sale.
Track everything
Add raw cards and slabs, keep cost and market attached, organize by collection, and retain the identifiers you use in the real world.
Find what should sell
Use combined inventory to compare cost against 85% and 80% sale values, then build a focused show or selling list.
Put it On Deck
Move selected cards into the active selling board, print the right labels, and share a customer-facing catalog from one QR code.
Sell, bundle, or trade
Record singles, multi-card bundles, or trades while keeping incoming cards, cash adjustments, and allocation math in one workflow.
Know the result
Move completed deals into sold history and keep the sale amount, cost, take-home, profit, and percentage of market tied together.
On Deck Selling Mode
Make the deal without doing the math twice.
Built for real negotiations
Singles are easy. Bundles and trades are where tools usually fall apart.
On Deck keeps the outgoing cards, incoming cards, cash adjustment, market totals, costs, and deal allocation visible. That means faster decisions and a cleaner record after the handshake.
Customer-facing table catalog
Turn one QR code into a browsable table.
Customers scan a sign, search the cards you actually brought, and see market prices without getting access to cost, internal notes, seller controls, or the rest of your inventory.
Three dedicated card modes
The same operating system, without mixing your data.
Each mode keeps its own raw and graded inventory while sharing the selling, label, public catalog, and sold-tracking foundation.
Pokémon
Raw and graded images, Collectr imports and linking, TCGplayer-oriented research, automatic raw IDs, show pricing, and public catalog support.
One Piece
Separate raw and graded inventory with the same core selling, collection, On Deck, label, search, and catalog structure.
Sports
Modern set-list intake, card-number-first filtering, parallels and variations, serial details, comp links, CSV tools, and eBay draft export.
Pokémon image support
See the card, not just another row.
Images make inventory faster to verify at home, easier to sell at a show, and more useful to customers browsing the public catalog. The current Pokémon workflow carries imagery across the places it matters.
Pokémon names, card artwork, and related marks belong to their respective owners and are shown for inventory-reference examples. Mount Diablo Cards is not affiliated with or endorsed by The Pokémon Company, Nintendo, Creatures Inc., or Game Freak.
On Deck by MDC
Stop rebuilding your inventory every time you need to sell it.
Keep the collection, the show list, the table catalog, the deal, and the result connected from the beginning.