The Flip Report

Learn how to grade, flip, and invest in baseball cards for profit.
Huntington, US
Created byProfile pictureDouglas Lamm
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Douglas Lamm@dlamm300·May 21

Hello, Lets Go Knicks

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Douglas Lamm@dlamm300·May 21

I Made $4,200 Last Month Flipping Baseball Cards — Here's What Most People Get Wrong

Most people lose money on baseball cards because they treat it like gambling instead of investing. Here's the framework I use:


The 3 rules I never break:


1. Never buy hype — buy the dip after hype. When a player has a monster week, everyone floods the market. Prices spike, then crash 2-3 weeks later when attention moves on. That crash is your buy window. Patience literally prints money in this hobby.


2. Grading is where the real margin lives. A raw card worth $20 can become a $150+ card with a PSA 10. But here's the thing — most people submit cards that have zero chance of gemming. Learning to self-grade before you submit saves you hundreds in fees and wasted time. I reject about 70% of cards I consider submitting.


3. Sell into narratives, not stats. A player getting traded to a contender? Sell into that news cycle. Playoff run? That's your exit window. The card market runs on emotion and storylines way more than actual performance numbers.


The biggest mistake I see: People hold everything hoping it'll be worth more "someday." Baseball cards are not index funds. Most cards depreciate. The money is in the turn — buy low, add value (grade it), sell into demand.


If you want to see how I source, grade, and flip cards every week, I break it all down inside The Flip Report.