4 Sharp Corners

4 Sharp Corners 🏆 Trusted destination for premium cards, collectibles & memorabilia. Buy, sell, consign, and submit with confidence through the hobby’s most trusted team.

Home of the world’s largest PSA submitter.

06/18/2026

One of the best moments in the hobby is opening a collection for the first time. 📦

You know there's something special inside—you just don't know exactly what yet.

That's where we are with this consignment.

Fresh inventory has arrived, the boxes are open, and we're starting to work through everything piece by piece.

👀 More highlights coming soon.

What would you hope to find inside a collection like this?

06/17/2026

The 1958 Topps Historical Heavyweights set is one of them.

Instead of focusing on a single season or a single era, it brought together legendary boxing champions and historical figures into one remarkable release.

That's what makes it so unique today.

It feels less like a traditional card set and more like a snapshot of sports history.

🔥 Available now⏰ Ends tomorrow at 9 PM ET

06/17/2026

One of the best parts of collecting is realizing there's always something new to discover.

Even for Michael Jordan.

Most collectors can name the iconic Jordans. But every once in a while, a release surfaces that reminds you just how deep the hobby goes.

This complete 1989–1991 Cleo Valentine's run is exactly that kind of find.

A unique Jordan issue that many longtime collectors have never even seen.

🔥 Available now⏰ Ends Thursday, 9:00 PM.

06/15/2026

The June Preview Page is officially live. 👀

Bidding doesn't open until Thursday, but collectors already have access to the full lineup.

This is your chance to browse, research, compare, and build your watchlist before the action starts.

From Shohei Ohtani rookie autographs to hundreds of other cards and collectibles, there's plenty to dig into.

⭐ Add items to your watchlist now and get an email notification when bidding opens.

What's the first thing you're watching?

06/14/2026

The NBA world is focused on championships right now. 🏀

But every legend started somewhere.

That's what makes this lineup so interesting.

These aren't championship moments. They're the rookie cards that came before them—the beginning of careers that would go on to define generations of basketball.

From Oscar Robertson and Elgin Baylor to Kobe Bryant, Allen Iverson, and Steve Nash, this group spans decades of basketball history.

⏰ Ending tonight.

Which basketball rookie card would you build around?

06/13/2026

Every collector has a different idea of the perfect card.

For some, it's the rookie card.

For others, it's the rookie card with the signature.

That's what makes this group so interesting.

These aren't just iconic cards—they're iconic cards finished with a DNA Auto 10.

A final touch on pieces collectors already dream about owning.

🔥 Live now ⏰ Ending TOMORROW

Which autograph adds the most to the card itself?

A lineup like this starts conversations. 🏒From Gordie Howe's era to Wayne Gretzky's dominance, these are the players who...
06/12/2026

A lineup like this starts conversations. 🏒

From Gordie Howe's era to Wayne Gretzky's dominance, these are the players who helped shape hockey history and generations of collecting.

The best part? There isn't a wrong answer.

Some collectors are taking Howe.
Some are taking Gretzky.
Some are going with Rod Gilbert.

🔥 Live now
⏰ Ending Sunday

Which hockey legend are you building around?

06/11/2026

Scarcity is the real story here.

Not Hall of Fame careers. Not iconic names.

Scarcity.

This lineup features multiple cards with population counts under 10, including examples with just 3, 4, 5, and 6 known copies at their grade.

That's what makes opportunities like this unusual.

Finding one is difficult.

Finding several available at the same time is even harder.

🔥 Live now
⏰ Ending Sunday

Which low-pop card stands out most to you?

06/10/2026

Some cards stand above the rest.

That's what 4SC Elite is all about.

These aren't just iconic names—they're exceptional examples of some of the most important cards in the hobby. The type of cards collectors wait years to find, let alone see offered together at the same time.

Jordan. Brady. Gretzky. Mantle. Aaron. Robinson.

🔥 Live now ⏰ Ending Sunday

Which one would be the centerpiece of your collection?

Every collector remembers the rookie cards that started it all. ⚾This lineup spans generations of baseball greatness—fro...
06/09/2026

Every collector remembers the rookie cards that started it all. ⚾

This lineup spans generations of baseball greatness—from Nolan Ryan and Johnny Bench to Rickey Henderson, Cal Ripken Jr., and more.

What makes this group special isn't just the names—it's seeing this many Hall of Fame rookie cards available together at once.

They're live now and begin closing Sunday evening.

Which rookie card would you build a collection around?

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