The four rules.
A lot of sports card content is about what to buy. Not enough of it is about how to think. The difference matters, especially if you’re teaching a kid.
My three sons have been collecting with me long enough that we’ve landed on four rules. They’re not original to us. They’re the rules anyone who has been in the hobby long enough has either figured out or paid tuition learning the hard way. But they’re ours now, and they’re the filter every card we add to this store passed through before we decided to list it.
Here they are.
Rule 1 — If you can’t verify it, you don’t own it.
The sports card world runs on trust, and trust runs on authentication. PSA, BGS, SGC, CGC — these are the grading companies that open the card, examine it, grade it, and seal it in a tamper-evident holder with a cert number. That cert number is the difference between a card you think is real and a card you know is real.
Every card in this store is in a PSA slab. Every product page shows the cert number. Every buyer can paste that number into the lookup tool at psacard.com/cert/ and see PSA’s own record — grade, date graded, population report — independent of anything we tell them.
We don’t sell ungraded cards. Not because ungraded cards are bad — some of the best cards in our personal collection are ungraded — but because we can’t stand behind them the way we can stand behind a slab. If we’re selling it to you, we want you to be able to verify it without taking our word for anything.
This is the first rule we teach the boys. Before you pay money for a card, you have to be able to verify what you’re paying for.
Rule 2 — Buy the card, not the hype.
The hobby cycles. A player has a breakout month, card prices double, then the next month they break a finger and prices come back to earth. Over a long enough timeline, the player who is actually good finds their level and everyone who overpaid in a hype spike learns what hype feels like when it evaporates.
We try to ignore both sides of that cycle. A card is worth what a card has been worth over a reasonable window — a year or three, not a month. We check eBay sold listings. We check PSA’s price guides. We look at where the player actually sits in the game, not where they sat last Tuesday.
My sons will tell you this is the rule they argue with me about most. They want to chase the hot card. I get it — it’s the same impulse that made me collect when I was their age. But over and over, the lesson they’ve watched play out is that the patient buyer ends up with more cards worth holding, and the hype buyer ends up with a shoebox of cards that used to be worth something.
Rule 3 — Own what you would want to own even if the market disappeared.
This one is the most useful thing I learned, and the hardest to teach.
Some cards we own because we think they’ll appreciate. Fine. That’s a legitimate reason. But most of the cards we keep, we keep because we’d still want them if the entire secondary market went to zero tomorrow. A rookie card of the player you grew up watching. A 1-of-1 from a set you loved as a kid. The first card one of the boys ever pulled out of a retail pack.
If you wouldn’t want the card in a world where it had no resale value, you don’t actually want the card. You want the price. Those are different things, and confusing them is the fastest way I know to turn a hobby into a bad investment habit.
When we put a card in the store, it’s almost always because we had a backup, or because we collectively decided it was time to let this one travel to a new home. It’s not because we thought it had peaked. It’s because someone else will love it more than the binder did.
Rule 4 — Keep the record.
Every card we buy goes into a spreadsheet with five columns: what it is, what we paid, when we bought it, where we bought it, and one line on why. If it ever sells, a sixth column fills in: when it sold, for what, and what we learned.
This is boring, and it is the rule my sons complain about most, and it is the rule that taught them more about business than everything else on this page combined.
You cannot learn without a record. A collector who cannot tell you what they paid for their cards, in aggregate, is guessing about whether their collection is growing in value or shrinking. A business that cannot tell you its margins is not a business — it is a hobby with a checking account.
When one of the boys sets a price on a card in this store, he pulls up the record. What did we pay? What have comparables been selling for? What’s our target margin on this category? He writes the price, and he knows why he wrote that price, and if it sells, the record gets updated. If it sits, the price comes down on a schedule and he learns what the market told him.
That loop — act, record, reflect, adjust — is the whole curriculum. The cards are just the homework.
What the rules produce
If you follow the four rules, you end up with a collection that:
- You can stand behind (rule 1)
- You understand the real value of (rule 2)
- You actually want to own (rule 3)
- You can learn from over time (rule 4)
Which, when you list a small slice of it for sale, becomes a store you can stand behind — every card authenticated, every price defensible, every entry in the ledger explainable to a kid.
That’s what this store is. Not a high-frequency flip operation. Not a clearance sale. A small, deliberate slice of a collection that’s been curated by a father and three sons who follow the same four rules every time a new card shows up in the mailbox.
If you buy a card from us, you’re buying something that passed all four.
Related reading
- The math behind selling from here instead of a marketplace → Why We Didn’t Build This on eBay
- How a PSA slab actually works → Reading a PSA Slab
- The family story → About
— John Phillips
Jacksonville, Florida
Published April 2026