Compz identifies the most profitable cards to buy raw and grade using real market data—so you stop guessing and start making better decisions.
LeBron James
Topps Chrome · 2003-04
Refractor RC
Raw avg
$353
PSA 10
$3,440
ROI
+874%
Mike Trout
Topps Update · 2011
Base RC
Raw avg
$290
PSA 10
$1,014
ROI
+250%
Patrick Mahomes
Panini Prizm · 2017
Silver RC
Raw avg
$738
PSA 10
$4,900
ROI
+565%
Most collectors rely on gut feel, forum posts, and outdated price guides. By the time you've done the research, the window is already closed—or worse, you've sent in a card that loses money after grading fees.
$25–$100+
per card in grading fees
before you see a single dollar back
Weeks
to get a grade back
only to find out the ROI wasn't there
Hours
of manual research per card
that most collectors don't have
We do the research. You make the call.
01
Compz pulls raw and graded sales data from major marketplaces every day, covering thousands of cards across sports and sets.
02
For every card, we calculate the expected profit after grading costs using real PSA 10 comp data and grade probability estimates.
03
We surface the top opportunities so you can act fast—before prices adjust and the window closes.
Ranked by expected ROI after grading costs. One card free. Unlock the rest with Compz Pro.
Full list includes 25+ opportunities updated every Monday morning.
Start free. Upgrade when you're ready.
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Where does the pricing data come from?
Compz aggregates completed sales from major card marketplaces. Raw prices and graded comps are updated regularly to reflect current market conditions.
What grading service does Compz assume?
Our default model uses PSA grading costs and PSA 10 comps. We account for submission fees in the ROI calculation.
How often is the list updated?
The opportunity list refreshes weekly. Pro members always see the most current snapshot.
What sports and card types are covered?
We currently cover basketball, baseball, and football. Pokémon and other TCGs are on the roadmap.
Can I cancel anytime?
Yes. Cancel anytime from your account. No questions asked.
Every week you wait is another missed opportunity. Join Compz and know exactly which cards are worth your money before you submit.
Cancel anytime. No questions asked.