Open the redesigned CardMargin app ↗
JJCARDS23

SPORTS CARDS · TCG · RAW · GRADED

EST. 2023
CardMargin by JJCARDS23

CARD DEAL ANALYZER

Buy smarter.
Know the margin.

One quick check before your next pickup.

FreeNo accountPrivate
SPORTSTCGRAWGRADEDPROFIT

1 · Your deal

Enter the card numbers

What are you collecting?
What do you want to compare?

Use sold comps for the exact card whenever possible.

2 · Decision

Your deal snapshot

Review deal
Better estimated path Grade and sell

Based on the values and probability you entered.

Expected profit$0.00after entered costs
Expected ROI0%profit ÷ purchase price
Break-even resale$0.00for the better path
Maximum offer$0.00to reach your target return
Sell raw$0.00 profit
Grade first$0.00 expected profit

THREE GOOD HABITS

Better inputs.
Better decisions.

01

Use sold comps

Match the exact card and condition.

02

Be honest on grade

Lower confidence when condition is unclear.

03

Protect your return

Let your target ROI set the maximum offer.

FREE COLLECTOR GUIDES

Make the deal
before the deal makes you.

Clear answers for the two questions collectors ask before buying or grading.

JJCARDS23 BOOKS

Track the cards.
Keep the story.

Practical logs for collectors who want cleaner records.

JJINVENTORY
LOGBOOK
JJCARDS23
COLLECTION

Sports Card Inventory Logbook

Track purchases, grades, values, and your collection.

View on Amazon
JJMULTI-GRADER
TRACKER
JJCARDS23
GRADING

Grading Submission Tracker

Organize submissions across multiple grading companies.

View on Amazon
JJPSA GRADING
TRACKER
JJCARDS23
PSA

PSA Grading Tracker

Record orders, grades, fees, values, and profit.

View on Amazon

FREE FROM JJCARDS23

Start tracking your collection.

Download a simple CSV for cards, costs, grades, sales, and profit.

Download free tracker