Professor Oak’s New Theory #101
Professor Oak’s New Theory is card #101 from HeartGold SoulSilver, a Uncommon Trainer card currently trading near $6.99 for its Reverse Holofoil printing.
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By CardLedger Research · Market data updated · Prices from TCGplayer & Cardmarket
Net estimates use each marketplace's default seller tier and typical shipping — fees vary by category, account status and payment method, so confirm current rates before selling.
There isn't enough recent sold history to call direction on Professor Oak’s New Theory #101. Sell on your own schedule.
Professor Oak’s New Theory at a glance
- Cardmarket does not list a price.
- From HeartGold SoulSilver (HeartGold & SoulSilver), released 2010.
- Rarity tier — Uncommon.
- No published price history.
- Current TCGplayer market value $6.99 (Reverse Holofoil).
Professor Oak’s New Theory price by printing
Live TCGplayer and Cardmarket values for Professor Oak’s New Theory #101.
TCGplayer prices, updated 2026/10/26.
- Low
- $4.00
- Mid
- $14.08
- High
- —
- Low
- $0.25
- Mid
- $0.72
- High
- —
Verify the card image and live listings on TCGplayer, Cardmarket or eBay.
Is this Professor Oak’s New Theory a good deal?
Put any asking price against today's live market value for Professor Oak’s New Theory #101.
Enter what a seller is asking for Professor Oak’s New Theory #101. We compare it to today's live market value.
About Professor Oak’s New Theory #101
Professor Oak’s New Theory is the #101 of 123 card in HeartGold SoulSilver, a classic-era set released in 2010 as part of the HeartGold & SoulSilver series. This Trainer (Supporter) is used in decks as well as collections.
Ken Sugimori illustrated this card. Its Reverse Holofoil printing is priced near $6.99, with listings from $4.00 to —.
Card facts
- Set
- HeartGold SoulSilver
- Series
- HeartGold & SoulSilver
- Number
- #101 / 123
- Rarity
- Uncommon
- Illustrator
- Ken Sugimori
- Subtype
- Supporter
- Released
- 2010/02/10
Professor Oak’s New Theory attacks, abilities & battle stats
Printed card text and battle statistics for Professor Oak’s New Theory #101 — the playability layer behind the price.
Battle stats
- Retreat cost
- —
- Attacks
- —
Professor Oak’s New Theory price analysis
What drives the current market value of Professor Oak’s New Theory #101.
There are 2 tracked printings here — Reverse Holofoil at $6.99, Normal at $0.71.
$6.99 gives Professor Oak’s New Theory real margin potential, so buy near the low end and sell toward the mid.
$6.99 gives Professor Oak’s New Theory real margin potential, so buy near the low end and sell toward the mid.
Cardmarket does not list Professor Oak’s New Theory, so TCGplayer and eBay are the reference markets.
Professor Oak’s New Theory price history & movement
Cardmarket does not publish recent price history for this card, so use sold listings on eBay and TCGplayer to gauge short-term movement.
Professor Oak’s New Theory has been tracked here for 4 days, ranging from $6.99 to $6.99; the latest value sits at 100% of that recorded range — at the high end of the band.
Daily moves average a volatility of 0%, and the largest peak-to-trough drawdown recorded is 0%.
Cardmarket averages
Price fingerprint
Built from CardLedger's own daily snapshots · 4 days tracked · latest
Real recorded values from our daily TCGplayer snapshots — not estimates or back-filled history. Methodology
How much would you net selling Professor Oak’s New Theory?
Model the real take-home on a [object Object] sale across eBay, TCGplayer, Cardmarket and direct — fees and shipping included.
Selling Professor Oak’s New Theory at $6.99 nets roughly $5.76 on eBay, $5.80 on TCGplayer, $6.29 via Cardmarket, $5.93 on Whatnot or $6.99 direct — the platform you pick is worth up to $1.23.
As a uncommon card, Professor Oak’s New Theory sells differently by venue: marketplaces maximise reach, personal channels maximise margin. Use the calculator to weigh reach against take-home.
Your sale
Pre-filled with the current TCGplayer market for Professor Oak’s New Theory #101.
Modelled on each marketplace's default seller tier with your shipping input. Net payout = sale price − selling fees − outbound shipping. Fee figures are estimates (last reviewed October 15, 2026) and vary by category, account status and payment method — confirm current rates with the marketplace. Open the full seller fee calculator to model account tiers and buyer-paid shipping.
Should you grade Professor Oak’s New Theory?
Model the break-even and PSA 9 vs PSA 10 profit on grading Professor Oak’s New Theory #101 against today's raw market value.
Grading plan
Pre-filled with the live market value for Professor Oak’s New Theory #101.
Both-way postage plus declared-value insurance.
Estimated graded values below are a transparent starting point based on the raw price band — edit them with real graded comps before deciding.
At $6.99 raw and $40.00 all-in grading cost, a PSA 10 nets — versus selling raw, a PSA 9 nets —. You need a graded sale of $52.97 to break even on grading.
At your stated grade odds the expected profit is — (-60.3% return on cost basis).
Grading costs, turnaround and grade outcomes vary by service and card. The estimated PSA 9 and PSA 10 values are heuristics, not predictions — always sanity-check against recent graded sold listings before committing. This is a modelling tool, not financial advice.
Professor Oak’s New Theory within HeartGold SoulSilver
By market value Professor Oak’s New Theory sits at #97 of 106 in HeartGold SoulSilver (set median $20.68).
Relative to the set median it is a value pick, placing it in the top 9%.
The set's top card is Gyarados (#123), valued at $499.99.
What makes Professor Oak’s New Theory valuable
- Uncommon is a common-to-mid rarity, so value depends more on condition, variant and playability than on scarcity alone.
- The Ken Sugimori artwork gives Professor Oak’s New Theory appeal beyond pure playability.
- Classic-era (2010) cards have a dedicated collector base and no prospect of new supply.
- As a Trainer card it is valued for deck utility and set completion.
- Its steady supply status keeps entry costs low, which supports steady turnover.
Buying & selling Professor Oak’s New Theory
- Because it is a Trainer card, Professor Oak’s New Theory has both collector and player demand — a broader buyer pool than purely collectible cards.
- Centring and surface condition matter most on Uncommon cards; a clean copy of Professor Oak’s New Theory can realise well above the $4.00 low end.
- If you are buying to resell, model marketplace fees first — the $6.99 value is pre-fee, and the seller-fee calculator shows the net take-home per platform.
- Bulk lots of Professor Oak’s New Theory can hide condition issues; inspect edges and holo surfaces before paying near the — high.
- Check sold listings rather than asking prices — the Reverse Holofoil market of $6.99 reflects actual transactions on TCGplayer.
Professor Oak’s New Theory value questions
How much is Professor Oak’s New Theory worth?
Live pricing puts the Reverse Holofoil print at $6.99 (low $4.00, high —); the Cardmarket trend is —.
Should I buy Professor Oak’s New Theory?
Short-term momentum is steady. Older print runs tend to be more defensive holds.
Is Professor Oak’s New Theory rare?
Professor Oak’s New Theory is a Uncommon card from HeartGold SoulSilver (HeartGold & SoulSilver series, 2010). It sits in a common-to-mid rarity tier, so condition and variant matter more than raw scarcity.
Does Professor Oak’s New Theory have multiple printings?
TCGplayer tracks 2 printings: Reverse Holofoil ($6.99), Normal ($0.71). Prices differ between variants, so always confirm which one you own or are buying.
Which marketplace sells Professor Oak’s New Theory?
The main marketplaces are TCGplayer (USD), Cardmarket (EUR) and eBay. Current TCGplayer market is $6.99. When selling, compare net proceeds after fees — eBay and TCGplayer typically charge 9–13%, while direct sales carry lower or no fees.
Why does Professor Oak’s New Theory cost what it does?
Four factors dominate: the Uncommon rarity tier, the classic-era HeartGold & SoulSilver set pedigree, playability (Trainer), and condition. Artwork by Ken Sugimori also matters to collector demand.
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