Japanese Promos 1998-99 · Normal

Ancient Mew I #P-ANCIENTMEWI-NINTEDOERROR, Normal, Japanese Promos 1998-99

Japanese edition

Card number: #P-ANCIENTMEWI-NINTEDOERROR
Rarity: Promo
Finish: Promo

Japanese Promos 1998-99 NormalJ89PPANCIENTMEWININTEDOERROR:EN

TKRJ89PPANCIENTMEWININTEDOERROR:EN-P10

Grading toolPro

TCGBerg fair value· PSA 10

$5,262

Our estimate of this card's fair value, calculated from recorded sales.

Sales evidenceVery strong

30D performance7.2%

30D: ↓ 7.2%
YTD: ↑ 94.2%
Market cap: $4.16M
Volatility: 4.1%

Last sale (Sep 21, 2026)Last sale

$5,500

PSA 10 · Sep 21, 2026

4.5% above TCGBerg fair value

5-sale avg

$5,382

last 5 sales

Population · PSA 10

791

graded copies

TCGBerg fair value · PSA 10

$5,262

30D7.2%YTD94.2%

Sales evidenceVery strong

Market cap

$4.16M

fair value x population

Population

791

graded copies

Last sale

$5,500

+4.5% vs fair

5-sale avg

$5,382

recent sales

GradingPro

Price history

Open terminalPro

Weekly fair value for PSA 10. Shaded area is the confidence band: how precisely we can pin the value; it tightens as more sales confirm it. Dots are individual sales.

TCGBerg fair value · PSA 10Sale below fairSale above fairOutlier

Oct 5, 202552 weekly points · 79 salesSep 27, 2026

Behind the scenes

What goes into this price, and how much we know.

Recent sales10 tracked

Most recent transactions. From public auction comps and dealer reporting. Showing 10 of 10; delta vs fair value is the difference between the sale price and the grade's quoted fair value on that date.

Date	Grade	Price	Source	vs TCGBerg FV
Sep 24, 2026	PSA9	$650	ebay	5.0%
Sep 24, 2026	PSA9	$625	ebay	8.6%
Sep 24, 2026	PSA1	$320	ebay	-
Sep 23, 2026	PSA9	$780	ebay	14.1%
Sep 22, 2026	PSA9	$661	ebay	3.3%
Sep 22, 2026	PSA9	$700	ebay	2.4%
Sep 21, 2026	PSA10	$5,500	ebay	4.5%
Sep 21, 2026	PSA2	$350	ebay	-
Sep 20, 2026	PSA8	$485	ebay	10.3%
Sep 20, 2026	PSA9	$714	ebay	3.5%

$650
Sep 24, 2026 · via ebay
PSA9versus fair value, down 5.0%
$625
Sep 24, 2026 · via ebay
PSA9versus fair value, down 8.6%
$320
Sep 24, 2026 · via ebay
PSA1-
$780
Sep 23, 2026 · via ebay
PSA9versus fair value, up 14.1%
$661
Sep 22, 2026 · via ebay
PSA9versus fair value, down 3.3%
$700
Sep 22, 2026 · via ebay
PSA9versus fair value, up 2.4%
$5,500
Sep 21, 2026 · via ebay
PSA10versus fair value, up 4.5%
$350
Sep 21, 2026 · via ebay
PSA2-
$485
Sep 20, 2026 · via ebay
PSA8versus fair value, down 10.3%
$714
Sep 20, 2026 · via ebay
PSA9versus fair value, up 3.5%

All grades matrix

Every grade we track for this printing. Click any column header to sort; the rightmost column jumps you to listings for that grade.

PSA10$5,262
1d 0.0%7d 0.2%30d 7.2%
Pop
791
Mcap
$4.16M
Evidence
Very strong
Last
$5,500
PSA9$684
1d 1.6%7d 0.1%30d 10.6%
Pop
3,230
Mcap
$2.21M
Evidence
Very strong
Last
$650
PSA8$531
1d 0.0%7d 2.8%30d 0.5%
Pop
1,150
Mcap
$610.6K
Evidence
Very strong
Last
$485


PSA10	$5,262	791	$4.16M	0.0%	0.2%	7.2%	21.6%	-	Very strong	$5,5001w ago
PSA9	$684	3,230	$2.21M	1.6%	0.1%	10.6%	15.3%	-	Very strong	$6504d ago
PSA8	$531	1,150	$610.6K	0.0%	2.8%	0.5%	3.4%	-	Very strong	$4851w ago
PSA7	$326	376	$122.7K	0.0%	0.6%	6.2%	2.3%	-	Strong	$2803mo ago
PSA6	$303	238	$72.2K	0.0%	0.5%	5.9%	1.6%	-	Strong	$2993w ago

TCGBerg fair value by grade

Value at each grade and ungraded condition, on a log scale that spans the full range from the lowest grade at $303 up to gem-mint at $5.3K. Log scale. Tap a row to switch the whole page.

Population & rarity

5,785 graded copies of Ancient Mew I Normal across 5 grades. The selected grade is highlighted.

PSA 10

791 · 14%

PSA 9

3,230 · 56%

PSA 8

1,150 · 20%

PSA 7

376 · 6.5%

PSA 6

238 · 4.1%

PSA 10 makes up 14% of graded copies: 791 of 5,785. PSA 9 is the most common grade (56%).

Relative valuation vs. index

How PSA 10 has moved relative to Japanese Promos 1998-99 · Composite since May 17, 2026. Both indexed to 100 at the index’s inception. Card underperformed by 19.8 pp.

About Japanese Promos 1998-99Parent set

This printing in the context of its parent set: total set cap and this printing's share of it.

Browse all sets →

Set total cap

$46.71M

across all printings

This printing's share

15.4%

of total set cap

Implied printing cap

$7.18M

share × set cap

Browse all sets →

Ancient Mew I - "Nintedo" Error at PSA 10 carries a TCGBerg fair value of $5,262 as of 2026-09-26. We track a TCGBerg fair value across 5 grades from Japanese Promos 1998-99, from PSA 6 up to PSA 10. A graded population of 791 copies sits behind the PSA 10 grade. The PSA 10 valuation rests on very strong sales evidence. Over the past 30 days, the PSA 9 TCGBerg fair value has fallen 10.6%.

Show more analysisAnalysis, commentary & FAQ

PSA 10 commentary

The TCGBerg fair value of a PSA 10 Ancient Mew I - "Nintedo" Error is $5,262 as of 2026-09-26. 791 copies have been graded at this level. This valuation rests on very strong sales evidence. Over the past 30 days the TCGBerg fair value has fallen 7.2%. The most recent recorded sale was $5,500 on 2026-09-21.

PSA 10 - frequently asked

What is the TCGBerg fair value of a PSA 10 Ancient Mew I - "Nintedo" Error?

$5,262 as of 2026-09-26, our model-derived fair value for a PSA 10 Ancient Mew I - "Nintedo" Error based on recent graded sales.

How rare is a PSA 10 Ancient Mew I - "Nintedo" Error?

791 copies have been graded at PSA 10, the graded population behind this atom.

How has the PSA 10 Ancient Mew I - "Nintedo" Error price moved recently?

Its TCGBerg fair value has fallen 7.2% over the past 30 days.

Frequently asked

What is the TCGBerg fair value of a PSA 10 Ancient Mew I - "Nintedo" Error?: $5,262 as of 2026-09-26, our model-derived fair value for a PSA 10 Ancient Mew I - "Nintedo" Error based on recent graded sales.
How rare is a PSA 10 Ancient Mew I - "Nintedo" Error?: 791 copies have been graded at PSA 10, the graded population behind this atom.
How has the PSA 10 Ancient Mew I - "Nintedo" Error price moved recently?: Its TCGBerg fair value has fallen 7.2% over the past 30 days.

PSA 9 commentary

The TCGBerg fair value of a PSA 9 Ancient Mew I - "Nintedo" Error is $684 as of 2026-09-26. 3,230 copies have been graded at this level. This valuation rests on very strong sales evidence. Over the past 30 days the TCGBerg fair value has fallen 10.6%. The most recent recorded sale was $650 on 2026-09-24.

PSA 9 - frequently asked

What is the TCGBerg fair value of a PSA 9 Ancient Mew I - "Nintedo" Error?

$684 as of 2026-09-26, our model-derived fair value for a PSA 9 Ancient Mew I - "Nintedo" Error based on recent graded sales.

How rare is a PSA 9 Ancient Mew I - "Nintedo" Error?

3,230 copies have been graded at PSA 9, the graded population behind this atom.

How has the PSA 9 Ancient Mew I - "Nintedo" Error price moved recently?

Its TCGBerg fair value has fallen 10.6% over the past 30 days.

Frequently asked

What is the TCGBerg fair value of a PSA 9 Ancient Mew I - "Nintedo" Error?: $684 as of 2026-09-26, our model-derived fair value for a PSA 9 Ancient Mew I - "Nintedo" Error based on recent graded sales.
How rare is a PSA 9 Ancient Mew I - "Nintedo" Error?: 3,230 copies have been graded at PSA 9, the graded population behind this atom.
How has the PSA 9 Ancient Mew I - "Nintedo" Error price moved recently?: Its TCGBerg fair value has fallen 10.6% over the past 30 days.

PSA 8 commentary

The TCGBerg fair value of a PSA 8 Ancient Mew I - "Nintedo" Error is $531 as of 2026-09-26. 1,150 copies have been graded at this level. This valuation rests on very strong sales evidence. Over the past 30 days the TCGBerg fair value has risen 0.5%. The most recent recorded sale was $485 on 2026-09-20.

PSA 8 - frequently asked

What is the TCGBerg fair value of a PSA 8 Ancient Mew I - "Nintedo" Error?

$531 as of 2026-09-26, our model-derived fair value for a PSA 8 Ancient Mew I - "Nintedo" Error based on recent graded sales.

How rare is a PSA 8 Ancient Mew I - "Nintedo" Error?

1,150 copies have been graded at PSA 8, the graded population behind this atom.

How has the PSA 8 Ancient Mew I - "Nintedo" Error price moved recently?

Its TCGBerg fair value has risen 0.5% over the past 30 days.

Frequently asked

What is the TCGBerg fair value of a PSA 8 Ancient Mew I - "Nintedo" Error?: $531 as of 2026-09-26, our model-derived fair value for a PSA 8 Ancient Mew I - "Nintedo" Error based on recent graded sales.
How rare is a PSA 8 Ancient Mew I - "Nintedo" Error?: 1,150 copies have been graded at PSA 8, the graded population behind this atom.
How has the PSA 8 Ancient Mew I - "Nintedo" Error price moved recently?: Its TCGBerg fair value has risen 0.5% over the past 30 days.

PSA 7 commentary

The TCGBerg fair value of a PSA 7 Ancient Mew I - "Nintedo" Error is $326 as of 2026-09-26. 376 copies have been graded at this level. This valuation rests on strong sales evidence. Over the past 30 days the TCGBerg fair value has risen 6.2%. The most recent recorded sale was $280 on 2026-07-05.

PSA 7 - frequently asked

What is the TCGBerg fair value of a PSA 7 Ancient Mew I - "Nintedo" Error?

$326 as of 2026-09-26, our model-derived fair value for a PSA 7 Ancient Mew I - "Nintedo" Error based on recent graded sales.

How rare is a PSA 7 Ancient Mew I - "Nintedo" Error?

376 copies have been graded at PSA 7, the graded population behind this atom.

How has the PSA 7 Ancient Mew I - "Nintedo" Error price moved recently?

Its TCGBerg fair value has risen 6.2% over the past 30 days.

Frequently asked

What is the TCGBerg fair value of a PSA 7 Ancient Mew I - "Nintedo" Error?: $326 as of 2026-09-26, our model-derived fair value for a PSA 7 Ancient Mew I - "Nintedo" Error based on recent graded sales.
How rare is a PSA 7 Ancient Mew I - "Nintedo" Error?: 376 copies have been graded at PSA 7, the graded population behind this atom.
How has the PSA 7 Ancient Mew I - "Nintedo" Error price moved recently?: Its TCGBerg fair value has risen 6.2% over the past 30 days.

PSA 6 commentary

The TCGBerg fair value of a PSA 6 Ancient Mew I - "Nintedo" Error is $303 as of 2026-09-26. 238 copies have been graded at this level. This valuation rests on strong sales evidence. Over the past 30 days the TCGBerg fair value has risen 5.9%. The most recent recorded sale was $299 on 2026-09-05.

PSA 6 - frequently asked

What is the TCGBerg fair value of a PSA 6 Ancient Mew I - "Nintedo" Error?

$303 as of 2026-09-26, our model-derived fair value for a PSA 6 Ancient Mew I - "Nintedo" Error based on recent graded sales.

How rare is a PSA 6 Ancient Mew I - "Nintedo" Error?

238 copies have been graded at PSA 6, the graded population behind this atom.

How has the PSA 6 Ancient Mew I - "Nintedo" Error price moved recently?

Its TCGBerg fair value has risen 5.9% over the past 30 days.

Frequently asked

What is the TCGBerg fair value of a PSA 6 Ancient Mew I - "Nintedo" Error?: $303 as of 2026-09-26, our model-derived fair value for a PSA 6 Ancient Mew I - "Nintedo" Error based on recent graded sales.
How rare is a PSA 6 Ancient Mew I - "Nintedo" Error?: 238 copies have been graded at PSA 6, the graded population behind this atom.
How has the PSA 6 Ancient Mew I - "Nintedo" Error price moved recently?: Its TCGBerg fair value has risen 5.9% over the past 30 days.

Every printing of Ancient Mew I and the indices that include this card in their constituent basket.

Indices containing this card

Parent set

Japanese Promos 1998-99

Set total cap

$24.74M

Date

Grade

Price

Source

vs TCGBerg FV

Sep 24, 2026

PSA9

$650

ebay

5.0%

Sep 24, 2026

PSA9

$625

ebay

8.6%

Sep 24, 2026

PSA1

$320

ebay

Sep 23, 2026

PSA9

$780

ebay

14.1%

Sep 22, 2026

PSA9

$661

ebay

3.3%

Sep 22, 2026

PSA9

$700

ebay

2.4%

Sep 21, 2026

PSA10

$5,500

ebay

4.5%

Sep 21, 2026

PSA2

$350

ebay

Sep 20, 2026

PSA8

$485

ebay

10.3%

Sep 20, 2026

PSA9

$714

ebay

3.5%

PSA10

$5,262

791

$4.16M

0.0%

0.2%

7.2%

Very strong

$5,5001w ago

PSA9

$684

3,230

$2.21M

1.6%

0.1%

10.6%

Very strong

$6504d ago

PSA8

$531

1,150

$610.6K

0.0%

2.8%

0.5%

Very strong

$4851w ago

PSA7

$326

376

$122.7K

0.0%

0.6%

6.2%

Strong

$2803mo ago

PSA6

$303

238

$72.2K

0.0%

0.5%

5.9%

Strong

$2993w ago

Ancient Mew I #P-ANCIENTMEWI-NINTEDOERROR, Normal, Japanese Promos 1998-99

Behind the scenesHow the published fair value for this grade was produced: the estimates that fed it, their share of the starting mix, and every recorded change afterwards. It describes one saved calculation, not a live recomputation.

Recent sales10 tracked

All grades matrix

Population & rarityHow Ancient Mew I's graded copies are spread across grades. Each bar is the number of copies graded at that grade; the percentage is that grade's share of the total graded population. Fewer copies at a grade = scarcer = a scarcity premium.

Relative valuation vs. indexBoth series are indexed to 100 at May 17, 2026, the index’s inception date, not the start of the selected range. A divergence means the card has outperformed or underperformed the index since then, by exactly the percentage-point gap.

About Japanese Promos 1998-99Parent set

Analysis

PSA 10 commentary

PSA 10 - frequently asked

PSA 9 commentary

PSA 9 - frequently asked

PSA 8 commentary

PSA 8 - frequently asked

PSA 7 commentary

PSA 7 - frequently asked

PSA 6 commentary

PSA 6 - frequently asked

Related

Indices containing this card

Parent set

Behind the scenesHow the published fair value for this grade was produced: the estimates that fed it, their share of the starting mix, and every recorded change afterwards. It describes one saved calculation, not a live recomputation.

Recent sales10 tracked

All grades matrix

Population & rarityHow Ancient Mew I's graded copies are spread across grades. Each bar is the number of copies graded at that grade; the percentage is that grade's share of the total graded population. Fewer copies at a grade = scarcer = a scarcity premium.

Relative valuation vs. indexBoth series are indexed to 100 at May 17, 2026, the index’s inception date, not the start of the selected range. A divergence means the card has outperformed or underperformed the index since then, by exactly the percentage-point gap.

About Japanese Promos 1998-99Parent set

Analysis

PSA 10 commentary

PSA 10 - frequently asked

PSA 9 commentary

PSA 9 - frequently asked

PSA 8 commentary

PSA 8 - frequently asked

PSA 7 commentary

PSA 7 - frequently asked

PSA 6 commentary

PSA 6 - frequently asked

Related

Indices containing this card

Parent set

Behind the scenes

Population & rarity

Relative valuation vs. index

Behind the scenes

Population & rarity

Relative valuation vs. index