Magikarpカスミのコイキングリーダーズスタジアム · #028/96 · 1998 · 🇯🇵 Japanese
The Hoshino Verdict
What this card’s market is actually doing — scored, stated and kept current.
Hoshino recorded 2 confirmed sales of this card in the last 12 months. That is too thin to call a trend, so we do not call one. The most recent sale we hold is 8 days old.
Verdict recomputed 10m ago · it changes as the market does.
Magikarp is card 28 of 96 in リーダーズスタジアム, released in 1998 as part of the ポケットモンスターカードゲーム series. This is the Japanese printing (カスミのコイキング).
We hold 2 confirmed sales on record for this card — every price on this page traces back to them.
Descriptive market data, not investment advice. The Hoshino Score measures how deep, liquid, widely-traded, dear and scarce this card’s market is from sales and population records we hold. It is not a forecast, not a recommendation, and not a rating of this card as an investment.
Price by grade
What each grade’s real sales say — median of what actually sold.
Each grade is priced on the median of its own real sales — never averaged across grades, and never across printings. A 1st Edition, Shadowless or No Rarity copy is a different market from the ordinary print, so it gets its own row; where a grade holds sales of more than one printing and we cannot tell which copy sold, it is shown without a price — we abstain rather than publish the blend.
| Tier | Price | Confidence | Liquidity | Basis | Obs. |
|---|---|---|---|---|---|
| PSA 9 | $104 | Thin2 of 5 confidence checks passed | 2 in 90d recorded | 2 sales · last recorded 8d ago | 2 |
| PSA 10 | $209 | — | — | modeled est. est. from PSA 9 × 2 |
How confident are we in each of these prices?
There is no weighting and no hidden formula here. We ask five plain questions about the sales behind a price, and the rating is simply how many of them we can answer yes to. Every threshold is the one our pricing engine already uses to decide whether it trusts its own answer — none was invented for this rating. A grade we publish no price for gets no rating either: there would be nothing to rate.
- ✗Enough sales to have a middle — 2 confirmed sales at this exact grade — under the 5 our pricing engine treats as a settled sample
- ✓Those sales agree with each other — The middle half of them spread 24% around the median
- ✓The market traded it recently — Most recent sale 8 days ago
- ✗More than one marketplace — Every sale came from the same marketplace, so this is one venue’s price rather than the market’s
- ✗Dated by the venue, not by us — 2 of 2 came from venues that publish no sale date, so those dates are the day we recorded the sale — an upper bound on when it actually traded
Where a rung reads last recorded, its most recent sale came from a venue that publishes no sale date — Mercari Japan publishes none — so that date is the day we recorded the sale, an upper bound on when it sold. The price is real; the date is an observation and we will not dress it up as a timestamp.
Cross-market comparisons and arbitrage routes are computed within one grade — PSA 10 against PSA 10, raw against raw. A route is never built from two different grades.
Price trend
Median market price over time, plus the sale-by-sale receipts.
Recent sales
| Sold | Venue | Region | Grade | Price | |
|---|---|---|---|---|---|
| 2026-09-12 8d ago recorded | 🇯🇵 Mercari Japan | Japan | PSA 9 | ¥12,222 · $79.23 | view ↗ |
| 2026-09-12 8d ago recorded | 🇯🇵 Mercari Japan | Japan | PSA 9 | ¥20,000 · $130 | view ↗ |
The 2 most recent — confirmed sales first, then estimates; distinct price points, identical re-ingested rows count once, never stacked. Venue is the marketplace the sale actually cleared on — eBay, Goldin, ALT, Fanatics, SNKRDUNK and the rest — established from the sale’s own listing URL, its auction house, or the feed’s own declaration of the venue. A via tag names the data feed that delivered the record; the feed is never the venue. Where none of those establish a marketplace the row says venue not disclosed rather than naming one we cannot prove. Rows tagged guide are marketplace price-guide points (TCGplayer market / Cardmarket trend), not confirmed sales; rows tagged est. are inferred from a listing that left the market, not directly-recorded sales. Rows tagged recorded come from a venue that publishes no sale date — Mercari Japan publishes none — so the date shown is the day we recorded the sale, an upper bound on when it sold. The price is real either way; we do not invent a date.
Buy from around the world
The lowest live ask on every platform we track — cheapest first.
Should you grade it?
Grading EV in dollars, not vibes.
Should you grade it? Every grader route, your cost basis, and Japan vs the West → · or scan a photo of your copy
Who is looking at this card
Demand and supply signals that move before price does.
This is where the attention layer goes: how much YouTube activity this card is getting (demand) against how many copies are listed for sale right now (supply). Rising demand into falling supply is the setup that moves before the price does — the leading indicator this category does not have.
We hold no readings for this card, so there is no number here. The model is built (src/attention); the collector has not run against this database yet, and until it has, an attention score would be something we made up. A blank panel that says so is the honest version of this section.
Long-term outlook
Scenario projection, not a promise.
Scenario projection based on demand/supply trends and known catalysts. Not investment advice and not a guarantee of future prices.
More from リーダーズスタジアム
Same set, same shelf.
Frequently asked questions
Answered from the data on this page — nothing here is written by hand.
What is the graded value of Magikarp (リーダーズスタジアム #028)?
Graded values for Magikarp (リーダーズスタジアム #028): PSA 9 — $104. Each tier is priced on its own sales — Hoshino never mixes a PSA 10 with a raw copy.
📛 Get the price badge
Embeddable price badges for カスミのコイキング — pick the look, copy, paste. Live global data no US-only rival can show.
Drop any of these into a listing, blog or forum signature. Each shows the live number with its honest basis — real market price with sale-count provenance, or a clearly labelled guide estimate — and updates as new sales land (cached 1 hour). Add ?theme=light for light backgrounds.
Track カスミのコイキング in your portfolio — free
Live value across every market we track, grade-EV on your exact copy, and alerts the second the price moves.