Pokespective
Professor's Research [Professor Sada] 189/198 Professor Program Promos Reverse Holo Pokémon card

Promo

Professor's Research [Professor Sada] 189/198 · Professor Program Promos · Reverse Holo

$13.74

TCGplayer market price · updated Oct 1, 2026

Rarely trades
Listed median $14.264% above market

TCGplayer listings · Snapshot Oct 1, 2026

The middle of TCGplayer's reported asking prices for this printing. Less sensitive to one extreme high ask than min/max; still sensitive to a thin market and the mix of conditions.

Lowest reported ask
$9.99

Across conditions, before shipping; not a verified offer.

USD · across conditions · before shipping. Asking prices are not completed sales; listing and seller counts are not supplied.

Asking prices over the past 90 days
Listed median / Market price$12.00$14.00$16.00$18.00Jul 4, 2026 · Market price $14.06Jul 5, 2026 · Market price $14.06Jul 6, 2026 · Market price $13.90Jul 7, 2026 · Market price $13.90Jul 8, 2026 · Market price $13.90Jul 9, 2026 · Market price $13.90Jul 10, 2026 · Market price $13.90Jul 11, 2026 · Market price $13.90Jul 12, 2026 · Market price $13.90Jul 13, 2026 · Market price $13.90Jul 14, 2026 · Market price $13.90Jul 15, 2026 · Market price $13.90Jul 16, 2026 · Market price $13.90Jul 17, 2026 · Market price $13.90Jul 18, 2026 · Market price $13.90Jul 19, 2026 · Market price $13.90Jul 20, 2026 · Market price $13.90Jul 21, 2026 · Market price $13.62Jul 22, 2026 · Market price $13.62Jul 23, 2026 · Market price $13.62Jul 24, 2026 · Market price $13.62Jul 25, 2026 · Market price $13.62Jul 26, 2026 · Market price $13.62Jul 27, 2026 · Market price $13.25Jul 28, 2026 · Market price $13.25Jul 29, 2026 · Market price $13.25Jul 30, 2026 · Market price $13.25Jul 31, 2026 · Market price $13.25Aug 1, 2026 · Market price $13.25Aug 2, 2026 · Market price $13.25Aug 3, 2026 · Market price $12.91Aug 4, 2026 · Market price $12.91Aug 5, 2026 · Market price $12.91Aug 6, 2026 · Market price $12.91Aug 7, 2026 · Market price $12.91Aug 8, 2026 · Market price $12.91Aug 9, 2026 · Market price $12.72Aug 10, 2026 · Market price $12.72Aug 11, 2026 · Market price $12.72Aug 12, 2026 · Market price $12.72Aug 13, 2026 · Market price $12.72Aug 14, 2026 · Market price $12.72Aug 15, 2026 · Market price $12.27Aug 16, 2026 · Market price $12.27Aug 17, 2026 · Market price $12.27Aug 18, 2026 · Market price $12.27Aug 19, 2026 · Market price $12.27Aug 20, 2026 · Market price $12.72Aug 21, 2026 · Market price $12.72Aug 22, 2026 · Market price $12.72Aug 23, 2026 · Market price $12.72Aug 24, 2026 · Market price $12.72Aug 25, 2026 · Market price $12.72Aug 26, 2026 · Market price $12.72Aug 27, 2026 · Market price $12.72Aug 28, 2026 · Market price $12.72Aug 29, 2026 · Market price $12.72Aug 30, 2026 · Market price $12.72Aug 31, 2026 · Market price $12.72Sep 1, 2026 · Market price $13.40Sep 2, 2026 · Market price $13.89Sep 3, 2026 · Market price $13.58Sep 4, 2026 · Market price $13.58Sep 5, 2026 · Market price $13.58Sep 6, 2026 · Market price $13.58Sep 7, 2026 · Market price $13.58Sep 8, 2026 · Market price $13.58Sep 9, 2026 · Market price $13.58Sep 10, 2026 · Market price $13.58Sep 11, 2026 · Market price $13.58Sep 12, 2026 · Market price $13.58Sep 13, 2026 · Market price $13.58Sep 14, 2026 · Market price $13.58Sep 15, 2026 · Market price $13.58Sep 16, 2026 · Market price $13.58Sep 17, 2026 · Market price $13.58Sep 18, 2026 · Market price $13.58Sep 19, 2026 · Market price $13.58Sep 20, 2026 · Market price $13.58Sep 21, 2026 · Market price $13.58Sep 22, 2026 · Market price $13.58Sep 23, 2026 · Market price $13.58Sep 24, 2026 · Market price $13.58Sep 25, 2026 · Market price $13.74Sep 26, 2026 · Market price $13.74Sep 27, 2026 · Market price $13.74Sep 28, 2026 · Market price $13.74Sep 29, 2026 · Market price $13.74Sep 30, 2026 · Market price $13.74Oct 1, 2026 · Market price $13.74Jul 4, 2026 · Listed median $14.88Jul 5, 2026 · Listed median $14.88Jul 6, 2026 · Listed median $16.26Jul 7, 2026 · Listed median $15.98Jul 8, 2026 · Listed median $15.98Jul 9, 2026 · Listed median $15.98Jul 10, 2026 · Listed median $15.98Jul 11, 2026 · Listed median $16.49Jul 12, 2026 · Listed median $16.49Jul 13, 2026 · Listed median $17.99Jul 14, 2026 · Listed median $17.99Jul 15, 2026 · Listed median $17.99Jul 16, 2026 · Listed median $17.99Jul 17, 2026 · Listed median $16.49Jul 18, 2026 · Listed median $16.49Jul 19, 2026 · Listed median $15.24Jul 20, 2026 · Listed median $15.24Jul 21, 2026 · Listed median $14.50Jul 22, 2026 · Listed median $14.50Jul 23, 2026 · Listed median $14.50Jul 24, 2026 · Listed median $14.50Jul 25, 2026 · Listed median $14.50Jul 26, 2026 · Listed median $14.06Jul 27, 2026 · Listed median $14.06Jul 28, 2026 · Listed median $14.06Jul 29, 2026 · Listed median $13.62Jul 30, 2026 · Listed median $13.62Jul 31, 2026 · Listed median $13.62Aug 1, 2026 · Listed median $13.62Aug 2, 2026 · Listed median $13.62Aug 3, 2026 · Listed median $13.62Aug 4, 2026 · Listed median $13.62Aug 5, 2026 · Listed median $14.06Aug 6, 2026 · Listed median $14.06Aug 7, 2026 · Listed median $13.62Aug 8, 2026 · Listed median $13.62Aug 9, 2026 · Listed median $13.62Aug 10, 2026 · Listed median $13.62Aug 11, 2026 · Listed median $13.17Aug 12, 2026 · Listed median $12.72Aug 13, 2026 · Listed median $12.72Aug 14, 2026 · Listed median $12.72Aug 15, 2026 · Listed median $13.62Aug 16, 2026 · Listed median $13.62Aug 17, 2026 · Listed median $13.62Aug 18, 2026 · Listed median $13.62Aug 19, 2026 · Listed median $13.62Aug 20, 2026 · Listed median $13.05Aug 21, 2026 · Listed median $13.17Aug 22, 2026 · Listed median $13.17Aug 23, 2026 · Listed median $13.17Aug 24, 2026 · Listed median $13.17Aug 25, 2026 · Listed median $13.17Aug 26, 2026 · Listed median $13.17Aug 27, 2026 · Listed median $13.17Aug 28, 2026 · Listed median $13.36Aug 29, 2026 · Listed median $13.36Aug 30, 2026 · Listed median $13.36Aug 31, 2026 · Listed median $13.36Sep 1, 2026 · Listed median $13.36Sep 2, 2026 · Listed median $13.40Sep 3, 2026 · Listed median $14.29Sep 4, 2026 · Listed median $14.38Sep 5, 2026 · Listed median $14.38Sep 6, 2026 · Listed median $14.26Sep 7, 2026 · Listed median $14.26Sep 8, 2026 · Listed median $14.26Sep 9, 2026 · Listed median $14.38Sep 10, 2026 · Listed median $14.38Sep 11, 2026 · Listed median $14.38Sep 12, 2026 · Listed median $14.38Sep 13, 2026 · Listed median $14.50Sep 14, 2026 · Listed median $14.50Sep 15, 2026 · Listed median $14.38Sep 16, 2026 · Listed median $14.38Sep 17, 2026 · Listed median $14.38Sep 18, 2026 · Listed median $14.38Sep 19, 2026 · Listed median $14.50Sep 20, 2026 · Listed median $14.48Sep 21, 2026 · Listed median $14.45Sep 22, 2026 · Listed median $14.45Sep 23, 2026 · Listed median $14.45Sep 24, 2026 · Listed median $14.36Sep 25, 2026 · Listed median $13.94Sep 26, 2026 · Listed median $13.94Sep 27, 2026 · Listed median $13.94Sep 28, 2026 · Listed median $13.62Sep 29, 2026 · Listed median $13.74Sep 30, 2026 · Listed median $13.94Oct 1, 2026 · Listed median $14.26Jul 4, 2026Oct 1, 2026
Listed medianMarket price

Daily summaries, not individual listings. Gaps mark missing or rejected readings; lines also break when checks are more than three days apart.

Recent snapshots
DateListed medianMarket price
Oct 1, 2026$14.26$13.74
Sep 30, 2026$13.94$13.74
Sep 29, 2026$13.74$13.74
Sep 28, 2026$13.62$13.74
Sep 27, 2026$13.94$13.74
Sep 26, 2026$13.94$13.74
Sep 25, 2026$13.94$13.74
View listings on eBayLive listings for this card, raw and graded copies.

Buying through this link supports Pokespective with a small commission. It never costs you more, and it never changes our numbers.

Before you buy

Low in its 12-month range

It rarely trades, and is cheap for its set.

Price

Low in its 12-month range

$12.2712-month range$16.65

17% below its highest price of the past year.

Versus the market

Not enough trading to say

It trades too rarely, or has too little recent price history, for a 2-month comparison with the market to mean anything.

The next 60 days

Slightly behind the market

41%chance to beat the market

In a typical outcome it ends about 1.7% behind the market. See the forecast ↓

Buying and selling

Rarely trades

16% of our price checks saw it move

The price shown may be stale; expect to wait.

Scarcity

Cheap for its set

#38of 66 in its set by price

Promo, widely printed: 4,015 of the cards we track (9%).

Grading

Fee exceeds raw price

>100% the grading fee, as a share of its price

A roughly $22 fee against $13.74 raw. Profitability depends on condition and graded sale prices; we track neither.

Compare this card's TCGplayer market price, listing prices, historical range and model outlook before you buy. Research for collectors; not personal investment advice.

The next 60 days: price forecast

41%

Slightly behind the market

An estimated 41% chance of beating the typical tracked card over the next 60 days; in a typical outcome it would end about 1.7% behind.

Next 60 days$12.00$13.00$14.00$15.00$16.00$17.00 Nov 2025FebMayAug
Next 60 days$10.00$20.00$30.00$40.00$50.00 Oct 2024MarAugJan 2026Jun
Likely range$12.78 – $16.218 in 10 outcomes
Middle half$13.41 – $14.90half of outcomes land here
Typical outcome$14.04-1.7% versus the market
Confidence83 / 100a narrow range, not a better outcome
How to read this forecast

The fan shows where the forecast puts the price in 60 days; the lines from today to then are drawn, not forecast day by day.

Assumes the whole market keeps rising about 3.9% every 60 days, as it has lately. That part is a guess from the recent past, not a prediction — the 'vs market' figure above does not depend on it.

Prices here are TCGplayer's market price, which is an average of recent sales, so it trails a real move by a few weeks. Part of any short-term forecast is that delay catching up — visible in the chart, but not something you can buy at.

Card analysis: Why it scores where it does

59

Above average

59 out of 100. It ranks above 60% of the cards we track.

Price steadinessVery steady price
Seller confidenceSellers less firm than most
Unusual moveFirmer recent move than most
Near its highBelow its 12-month high
Listing tightnessTight listings
1-month trendClimbing this month

Each ingredient is weighted by how well it has preceded price moves in this market's own history. The exact weights and readings are in The full read.

The full read

Every question we ask of a card, and every number behind the answers.
Next 60 days: 41% chance to beat the market

Price history, listings and card analysis

Professor's Research [Professor Sada] 189/198 Professor Program Promos Reverse Holo (Reverse Holofoil). TCGplayer market price: $13.74 as of Oct 1, 2026. Recorded price history: 812 daily market-price observations, Jul 12, 2024 to Oct 1, 2026. 12-month recorded market-price range: $12.27 – $16.65. TCGplayer lowest listed ask: $9.99 as of Oct 1, 2026, across conditions, before shipping. TCGplayer listed median: $14.26 as of Oct 1, 2026. Pokespective interest score: 59 out of 100 (Above average); It ranks above 60% of the cards we track. 60-day price forecast: An estimated 41% chance of beating the typical tracked card over 60 days; in a typical outcome it would end about 1.7% behind. Four times in five the price lands between $12.78 and $16.21. This card's pricing is flagged, so treat the forecast as unusable rather than merely uncertain. 60-day forecast: Likely range: $12.78 – $16.21; 8 in 10 outcomes. 60-day forecast: Middle half: $13.41 – $14.90; half of outcomes land here. 60-day forecast: Typical outcome: $14.04; -1.7% versus the market. 60-day forecast: Confidence: 83 / 100; a narrow range, not a better outcome.

Beating the market, or just riding it?

Not enough trading to say

It trades too rarely, or has too little recent price history, for a 2-month comparison with the market to mean anything.

Describes the last 2 months, not what happens next. Not investment advice.

Is this card interesting right now?

Above average - 59 out of 100

It ranks above 60% of the cards we track. The score describes the conditions around the card today - how sellers are pricing it, how it is trending, how steadily it trades. Its weights were tuned on how cards moved over the following 60 days, so a high score is a tendency across many cards, not a forecast for this one - and it says nothing about whether you will enjoy owning the card.

Why is it interesting?

Very steady price and sellers less firm than most

The price moves in small, calm steps rather than lurching around. Asking prices sit above recent sales, but by less than on most cards - so relative to the rest of the market, sellers here are less firm.

Is it becoming more popular?

Mixed

Compared with the Pokemon market as a whole, so a rising tide does not count as popularity. In this market these trends have tended to keep going rather than reverse.

Past month+1.5%
Past 2 months-0.9%
Past 4 months-13.8%

Is it expensive or cheap?

$13.74 - cheap for its set

At $13.74 it is one of the cheaper cards in its set - number 38 of 66 by price. It costs more than 57% of other Promo cards we track. It is 17% below its 12-month high. Worth knowing: in this market cards near their highs have gone on to do better than deeply discounted ones, so a big discount is not automatically a bargain.

What makes this card unusual?

An ordinary Promo from a recent set

Promo is a widely printed rarity - 4,015 tracked cards share it. This is the Reverse Holofoil printing, which is priced as a completely separate market from the other printings of the same artwork.

Could you actually buy or sell it?

Slowly - it rarely trades

The price changed in 16% of our checks over the past year across 365 observations. TCGplayer's market price only updates when a copy sells, so a low figure means the price shown may be stale and any trend reading is built on very few real sales.

How does the grading fee compare?

Fee exceeds raw price

A roughly $22.00 grading fee is 160% of the $13.74 raw price. Raw price plus fee comes to about $35.74, before shipping, insurance or selling costs. That is a cost comparison, not an estimate of a graded copy's value. We track raw ungraded prices only - no graded sales and no population data. We cannot assess this copy's condition or tell you what a PSA 10 is worth. Check condition and comparable graded sales before deciding whether grading would pay off.

The score's ingredients

IngredientWeightEffect on the scoreTrack record
Price steadiness10%+0.079Weak record
Seller confidence30%-0.066Strong record
Unusual move16%+0.055Strong record
Near its high5%-0.046Consistent record
Listing tightness6%+0.028No measured edge
1-month trend16%+0.024Strong record
4-month trend3%-0.022Consistent record
2-month trend14%-0.009Consistent record

Price by month

TCGplayer market price on the last day we have for each month; the current month so far.

MonthPriceChange
Oct 2026$13.74+0.0%
Sep 2026$13.74+8.0%
Aug 2026$12.72-4.0%
Jul 2026$13.25-5.8%
Jun 2026$14.07+1.9%
May 2026$13.81-3.2%
Apr 2026$14.26+1.6%
Mar 2026$14.03-7.1%
Feb 2026$15.11+0.3%
Jan 2026$15.06+2.9%
Dec 2025$14.64-1.7%
Nov 2025$14.89-1.6%

Every number behind this page

Market price$13.74What copies have recently sold for
Cheapest listing$9.99The lowest price anyone is currently asking
Middle of listings$14.26The midpoint of what sellers are asking
Seller confidence+3.8%Asking prices are above recent sales — sellers are in no hurry
1-month trend vs market+1.5%Outpacing the market
2-month trend vs market-0.9%In line with the market
4-month trend vs market-13.8%Falling behind the market
Versus same-set, same-rarity cards-5.3%Shown for interest only — this one is not part of the score
Unusual move+0.4Within its normal range of movement
Below its 12-month high-17.5%Well off its high
Day-to-day price movement0.0106Calm and steady
How often it trades16%Rarely trades — the price shown may be stale
Price checks on record365Observations in the past year
Times the price changed57How many of those were real moves
Actively tradedYesWhether there is enough activity for the trend figures to mean anything
Interest score60 / 100Ranks above 60% of tracked cards
TCGplayer product ID556,953For looking it up elsewhere