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PhD data scientist analyzing the Pokémon market. Daily market data, trends & weird anomalies. Building @CardBoardTerm | https://nitter.gq/t.co/6nm4v6MG0q

Kanto
Joined May 2026
Photo by ProfPokeQuant (@ProfPokeQuant)Photo by ProfPokeQuant (@ProfPokeQuant)Photo by ProfPokeQuant (@ProfPokeQuant)Photo by ProfPokeQuant (@ProfPokeQuant)Photo by ProfPokeQuant (@ProfPokeQuant)Photo by ProfPokeQuant (@ProfPokeQuant)Photo by ProfPokeQuant (@ProfPokeQuant)Photo by ProfPokeQuant (@ProfPokeQuant)Photo by ProfPokeQuant (@ProfPokeQuant)Photo by ProfPokeQuant (@ProfPokeQuant)
I just launched the Cardboard Terminal iOS app! Cardboard Terminal finds underpriced trading cards on eBay. Now you can set custom alerts and get a push notification when a good deal pops up for a card you want. Totally free: apps.apple.com/app/id6804825…
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One of my fastest flips yet. Picked up this One Piece Marshall D. Teach PSA 10 for $414 on Thursday. Sold it less than 48 hours later for $550 ($484 after fees). $70 profit after fees in under two days. Not bad! Deals like this are hiding in eBay every day. I've made deal finder completely free if you want to check it out: cardboardterminal.app/deal-f…
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Bought this PSA 9 Reshiram & Charizard Pokemon card for $330 on Tuesday using Deal Finder. Sold it for $500 this morning. A quick $170 spread before fees 🔥 And get this... another copy sold yesterday for $700. Some crazy deals hiding on eBay right now. Deal Finder is free if you want to check it out: cardboardterminal.app/deal-f…
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Insane number of deals tonight sheesh
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I didn't love the tools that existed for exploring card sales data. So I built my own. It lets you chart individual card prices over time split by grade (of course). But I wanted to go further. I built market indices for every major category, set, era, and character/player. For example, you can compare how Pokémon is performing against One Piece and Riftbound (shown below). Pokémon has been crushing it this year, but might be showing early signs of a correction 👀 You can also get pretty creative grouping the data different ways. Want to see whether vintage PSA 6s are outperforming modern PSA 10s? You can do that. Check out the tool if you're interested - totally free. I'd love to see what people come up with. Post the coolest chart you can make 😎 cardboardterminal.app/cards/…
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I think I just found something the Pokémon card market hasn't caught onto yet. Some booster packs now have a calculated expected return of over 200%. Here's the math. A few months ago, I wrote a post about calculating the expected value of opening every Pokémon booster pack using pull rates, recent sales, and PSA grading data. One set stood out: Fates Collide. At the time, a pack cost about $44, and its contents were worth $36.47 on average if you sold or graded each hit optimally. An 83% expected return. Better than a lottery ticket, but still a losing proposition. But something has changed. Graded Pokémon card prices have skyrocketed, while sealed pack prices haven't kept up. Today, the math looks completely different: • Pack price: $44.88 • Expected value: $107.57 • Expected return: 240% So where does all that EV come from? Take Mew Holo #29. A PSA 10 is now worth around $3,000, up 743% in the past year. But unlike the ultra-rare chase cards, you pull Mew about once every 34 packs. Obviously, not every copy gets a PSA 10. So I weight each possible grade by its historical PSA frequency, subtract grading costs, and account for the probability of pulling the card. The result? Mew alone contributes $18.16 of EV to every Fates Collide pack. Lugia BREAK adds another $9.46. I repeat this process for every card in the set. Interestingly, despite the 240% expected return, there's still a 76% chance of getting back less than 25% of your money. Most packs lose money. A handful of enormous hits pull the average way up. And Fates Collide isn't alone anymore. Several other sets now have positive modeled EV too. The prices of individual graded cards are moving faster than the sealed packs containing them. I've made the entire pack EV tool free on Cardboard Terminal if you want to check it out: cardboardterminal.app/packs
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Important note: PSA grading data has selection bias, and here I assume all hits are suitable for grading. I've included a slider in the tool so you can adjust this assumption. For example, if you think only 50% of pack-fresh Fates Collide cards are worth grading, you can set it to 50% and see how the EV changes.
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This Charizard just surfaced on Deal Finder and is live now. Listed 30 minutes ago. Buy it Now: $3,000. Last sale: $4,600 only two days ago. Yes, it’s a seller with 0 reviews. But it does have Authenticity Guarantee. Check it out on Deal Finder: cardboardterminal.app/deal-f…
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Sunday has the most deals on graded cards. So every Sunday, I put together a list of all the auctions I'm watching. Here is the list for today: cardboardterminal.app/labs/s…
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I just added Buy it Now listings to Deal Finder. Crazy graded card deals already coming through. Listed 2hrs ago at $570. In the PSA vault. Sales this month: $606 $775 $999 Check it out on Deal Finder, completely free: cardboardterminal.app/deal-f…
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First edition base set Charizard. The grail of all grails. HALF PRICE 🤯🤯 Auction ends in an hour. Check it out on Deal Finder: cardboardterminal.app/deal-f…
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Sundays have more graded card auctions ending than any other day. That also means more chances for good auctions to slip under the radar while buyers are spread thin. I put together the auctions I’m personally watching today. Sunday Snipes 👇 cardboardterminal.app/labs/s…
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Fantastic day 1 of Collect-a-con! Was awesome to meet a few Cardboard Terminal users. But most epic was meeting @WakaFlocka !
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Insane deal for a card literally in the PSA vault. 32% under market value. Ending in 30 mins with 0 bids 🤯 Check it out on Deal Finder: cardboardterminal.app/deal-f…
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I’m going to make a proper announcement about this later, but I quietly pushed a pretty big Deal Finder update. It’s not just Pokémon anymore. Sports One Piece MTG Dragon Ball Lorcana and a bunch more. Same idea: find graded card auctions ending below recent comps. Still cleaning a few things up before I announce it properly, but if anyone wants to try it early: cardboardterminal.app/deal-f…
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This is one of the craziest examples I’ve seen of an auction slipping under the radar. This PSA 10 Gengar sold 50+ times this week. Almost every sale was around ~$405. Then one auction ended at: $207.50. Same card. Same grade. Same week. It even had eBay Authenticity Guarantee. So what was different? The seller. Most of the other copies were being sold by PSA, an account with 750,000+ reviews. This one came from a small seller with just 72. It slipped through at 49% below the going rate. That’s exactly what I built Deal Finder for. Most platforms' algorithms surface what they think you’ll click. Deal Finder surfaces what looks mispriced. This helps buyers find great deals. And it helps sellers, big and small, get more eyes on their auctions. If you want an algorithm built to surface deals: cardboardterminal.app/deal-f…
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