Stacking Slabs

In this episode of Passion to Profession, I sit down with Stan and Roger from 4 Sharp Corners, one of the biggest names in the graded card market.

We talk about how childhood friends turned their love of collecting into a full-time business that has submitted over 5 million cards to PSA.

They share how they saw the opportunity in professional grading before it took off, the challenges of scaling, and the mindset that has kept them at the top of the game for over 20 years.

We also get into:

• The early days of 4 Sharp Corners and how they built their business
• Their philosophy on grading, collecting, and staying ahead of the curve
• The biggest lessons they’ve learned in running a high-volume card business
• The cards that have blown them away over the years

If you’re serious about collecting or thinking about taking the leap into the hobby full-time, this is one you won’t want to miss.

A special thank you to eBay for sponsoring Passion to Profession. The biggest and best marketplace to buy your next favorite trading card.

Get exclusive content, promote your cards, and connect with other collectors who listen to the pod today by joining the Patreon: Join Stacking Slabs Podcast Patreon

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Women's basketball cards are having a moment.

Katelyn (@coldlunchcards) returns to Stacking Slabs to break down the growth of WNBA and NCAA women's basketball cards, the role Caitlin Clark has played in driving the market, and the rise of prospecting for the NCAA Women's Tournament.

We talk about:

• The explosion of interest in WNBA cards
• How Unrivaled is changing the game
• What makes this NCAA Women's Tournament special
• The best opportunities in the card market right now

Katelyn shares her process for scouting players, buying cards before the hype, and positioning herself for success in a growing market. If you're looking to better understand where women's basketball cards are headed and how to get involved, this is the episode for you

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This week on Auction Talk, Nic and I dive into the latest trends, key sales, and the cards collectors are chasing. From rare ‘90s inserts to modern monsters, we cover it all, including:

• The Tom Brady 2004 Fleer EX Essential Credentials Now /19 jersey number copy and why it might be undervalued.
• A 1998 Ultra Masterpieces Cal Ripken Jr. 1/1 and the case for Ripken getting more hobby love.
• The coveted 1998 Ken Griffey Jr. Red Crusade /25 and why these cards matter to collectors 
• How Caitlin Clark continues to set new market records.
• A 2009 Bowman Chrome Calvin Johnson Superfractor 1/1 PSA 10—a sneaky big-time card.
• A blind ranking of Prizm designs that forces Nic into tough choices.

We also hit the mailbag with questions about the future of Panini cards, private sales data, and the psychology behind PC decisions.

If you’re following the market, this is an episode you don’t want to miss. Listen now and get ahead of the game.

Listen, subscribe, and if you enjoy the show, tell a damn friend.

Don't forget to check out The Wharf Sports Cards for all of your consignment and card funding needs.

Get exclusive content, promote your cards, and connect with other collectors who listen to the pod today by joining the Patreon:
Join Stacking Slabs Podcast Patreon

[Distributed on Sunday] Sign up for the Stacking Slabs Weekly Rip Newsletter using this link

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Follow Nic: | Instagram | Website | 

The best collectors don’t go at it alone. Conversations shape the way we collect, helping us make smarter purchases, uncover rare finds, and build lasting relationships. In this episode, I break down why talking to other collectors is the most underrated edge in the hobby.

I’ll share insights from my recent conversations like what I learned, how they changed my perspective, and why surrounding yourself with the right people will take your collecting to the next level. If you’re not talking to other collectors, you’re limiting yourself.

Stacking Slabs is here to make you a sharper collector every damn week. Tune in and tell a damn friend.

Enjoy it? Tell a damn friend.

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Adam at AMT Memorabilia turned his passion for collecting into one of the top-selling eBay businesses in the hobby. In this episode of Passion to Profession, he shares his journey from breaking UFC cards for fun to running a full-scale consignment and breaking operation.

We talk about:

• The mindset shift from collecting to business
• His approach to standing out in a crowded marketplace
• The challenges of scaling from a solo operation to a team
• How AMT is bridging the gap between card shows and online auctions

Plus, we highlight five key cards from his latest auction—including a Tom Brady Downtown Gold and a Caitlin Clark 1/1 Auto.

A special thank you to eBay for sponsoring Passion to Profession. The biggest and best marketplace to buy your next favorite trading card.

Get exclusive content, promote your cards, and connect with other collectors who listen to the pod today by joining the Patreon: Join Stacking Slabs Podcast Patreon

[Distributed on Sunday] Sign up for the Stacking Slabs Weekly Rip Newsletter using this link

Check out Card Ladder the official data partner of Stacking Slabs

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Follow AMT Memorabilia: | Instagram | eBay Store

In this episode, I sit down with longtime collector Joey (@the.e.trader) to talk about what it means to identify cards as good stores of value. Joey has built his collection by recognizing opportunities, whether it's picking up rare Kobe PMGs or capitalizing on market shifts in Tom Brady gold parallels.

We break down:

• How to spot undervalued cards
• The balance between collecting and investing
• Why understanding a market inside and out gives you an edge
• The importance of buying cards that don’t require a long explanation

If you want to make better decisions when acquiring cards, this episode is a must-listen.

Start your 7 day free trial of Stacking Slabs Patreon Today

[Distributed on Sunday] Sign up for the Stacking Slabs Weekly Rip Newsletter using this link

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This week on Auction Talk, Nic from The Wharf Sports Cards and I go deep into auction trends, and the conversation takes a turn right away. We spend time analyzing a key threshold—$3,000—and what it tells us about the market’s health.

Collectors are making moves, consolidating into bigger cards, and the numbers back it up. We discuss:

• The rise in $3K+ sales and what it means
• Why GOATs like MJ, LeBron, Kobe, Brady, and Bonds continue to dominate
• Set collectors quietly shaping the market (2012 Prizm Gold, anyone?)
• The psychology behind moving cards and reworking collections
• National Treasures—is the decline happening in real time?

We also hit on the biggest auctions from the past week, including some wild sales that had us scratching our heads.

Listen, subscribe, and if you enjoy the show, tell a damn friend.

Don't forget to check out The Wharf Sports Cards for all of your consignment and card funding needs.

Get exclusive content, promote your cards, and connect with other collectors who listen to the pod today by joining the Patreon:
Join Stacking Slabs Podcast Patreon

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Collectors have lanes, but sometimes stepping outside those lanes can lead to some of the most rewarding moments in the hobby. In this episode, I explore what it means to identify opportunities beyond your primary collection. When do you recognize a shift? What drives the decision to explore a new category? How do you balance curiosity with discipline?

I share a personal experience of spotting an opportunity, the thought process behind making the move, and why I believe experimentation is crucial for long-term collecting success.

Tune in and let’s talk about expanding your collecting perspective while staying true to what you love.

Enjoy it? Tell a damn friend.

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[Distributed on Sunday] Sign up for the Stacking Slabs Weekly Rip Newsletter using this link

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Passion to Profession is back, and this time, we’re diving into the fast-growing world of F1 cards.

Mike at Leahi51513, the largest seller of F1 cards on eBay, joins the show to break down how he built a thriving business, why he believes F1 cards are a generational opportunity, and what he’s seeing in collector behavior.

We talk about:

• How F1 cards went from overlooked to must-have
• The global collector base driving demand
• Lessons from the basketball boom and how they apply to F1
• Why curated auctions are changing the game
• The patience and mindset needed to turn passion into profession

Whether you're deep into F1 or just curious about new opportunities in the hobby, this one’s worth your time.

A special thank you to eBay for sponsoring Passion to Profession. The biggest and best marketplace to buy your next favorite trading card.

Get exclusive content, promote your cards, and connect with other collectors who listen to the pod today by joining the Patreon: Join Stacking Slabs Podcast Patreon

[Distributed on Sunday] Sign up for the Stacking Slabs Weekly Rip Newsletter using this link

Check out Card Ladder the official data partner of Stacking Slabs

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Follow Leahi: | Instagram | F1 Featured Auction | eBay Store

Luka Doncic is a Laker. The move that nobody saw coming has sent shockwaves through the NBA and the hobby. How are collectors reacting? What’s happening to Luka’s key cards? And what does this trade say about the player vs. team collecting dynamic?

Chris McGill (@chris_hoj) joins me to break it all down. We get into:

• The immediate market impact on Luka’s cards
• How the trade has shifted collector sentiment
• The psychology of player collecting vs. team collecting
• What this move means for Luka’s long-term collectibility

If you collect basketball cards, you need to hear this conversation.

Start your 7 day free trial of Stacking Slabs Patreon Today

[Distributed on Sunday] Sign up for the Stacking Slabs Weekly Rip Newsletter using this link

Check out Card Ladder the official data partner of Stacking Slabs

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