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Mermail King - Neptabyss (Quarter Century Secret Rare)
Yu-Gi-Oh · Quarter Century Secret Rare

Mermail King - Neptabyss (Quarter Century Secret Rare)

ROTA-EN046Rage of the Abyss
$11.56
-$0.56-4.6% · 30D
Aggregated from verified sold data · eBay, TCGplayer & PriceCharting
Where these prices come from

Yu-Gi-Oh prices on TCGIndex are TCGplayer market prices (the US market), in US dollars, with graded and sold prices from PriceCharting and eBay. Another currency is a conversion from USD at the day's rate, not a European market price. We do not use Cardmarket or Cardtrader prices for Yu-Gi-Oh.

Market Health
Excellent
Strong demand
Confidence
86/100
High reliability
Liquidity
Medium
Moderate activity
Sales Volume
30 / yr
Sold per year, updated 2h ago
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Before the price moves

We find the Yu-Gi-Oh cards about to rise.

Every night the model scores every Yu-Gi-Oh! card on the market. Every morning at 07:30 UTC it publishes the one most likely to gain 10% within 30 days, with its entry price and the reasons, then scores it in public.

Hit +10%
53%
Average return, day 30
+16.8%
Picks scored
145

Last 90 days, live picks only, losses included.

Picked before they moved
Assault Blackwing - Kusanagi the Gathering Storm (Starlight Rare)
+232.5%
Assault Blackwing - Kusanagi the Gathering Storm (Starlight Rare)
$11.87 → $39.47
Superdreadnought Rail Cannon Gustav Rocket (Starlight Rare)
+127.7%
Superdreadnought Rail Cannon Gustav Rocket (Starlight Rare)
$14.84 → $33.79
Mulcharmy Meowls
+98.7%
Mulcharmy Meowls
$10.17 → $20.21
See today’s Yu-Gi-Oh! pick

Published this morning, public in 14 days. Full record

Price & Volume
Market price Sales volume
Jul 2026 – today
Sales & Liquidity
Market Price$11.56
7-Day Change+0.3%
90-Day Change-10.7%
LiquidityMedium
Market TrendStable
Price by Grade
BGS 10$125·
PSA 10$96·
SGC 10$58·
PSA 9$57·
CGC 10$38·
Raw· 30 sales$12·
Price by Condition · 3
Anchored to market price · condition spread from TCGplayer
Near Mint
1st Edition · English
$11.56
+0.4%
Lightly Played
1st Edition · English
$11.87
-7.9%
Moderately Played
1st Edition · English
$10.11
+0.0%

Mermail King - Neptabyss (Quarter Century Secret Rare) price history

Near Mint market price on the dates below, from TCGIndex's daily record (82 days tracked). High $14.84 on Feb 2026, low $11.36 on Oct 2026.

WhenPricevs today
Today$11.43
7 days ago$11.40+0.3%
30 days ago$11.98-4.6%
90 days ago$12.79-10.6%
6 months ago$13.96-18.1%
MonthMonth-end price
Jan 2026$14.80
Feb 2026$14.61
Mar 2026$14.65
Apr 2026$14.13
May 2026$13.81
Jun 2026$13.15
Jul 2026$12.81
Aug 2026$12.54
Sep 2026$12.02
Oct 2026$11.40
Nov 2026$11.43

Mermail King - Neptabyss (Quarter Century Secret Rare) PSA 10 price and graded values

What Mermail King - Neptabyss (Quarter Century Secret Rare) (Rage of the Abyss) sells for by grade, from verified sold listings. A PSA 10 sells for $96.07 against $11.56 raw, a 8.3x grading premium. PSA 9 copies trade around $57.11.

GradeMarket price
Raw (ungraded)$11.56
CGC 10$38.00
PSA 9$57.11
SGC 10$58.00
PSA 10$96.07
BGS 10$125.00

Graded prices: PriceCharting sold data, refreshed daily. Grading costs, turnaround and the odds of a 10 decide whether the premium is worth chasing. Most valuable Yu-Gi-Oh PSA 10 cards

Mermail King - Neptabyss (Quarter Century Secret Rare) FAQ

How much is Mermail King - Neptabyss (Quarter Century Secret Rare) worth right now?
Mermail King - Neptabyss (Quarter Century Secret Rare) from Rage of the Abyss is trading around $11.56 raw (ungraded) on the secondary market, and around $96.07 as a PSA 10. TCGIndex refreshes this price every day.
How much is Mermail King - Neptabyss (Quarter Century Secret Rare) PSA 10 worth?
A PSA 10 Mermail King - Neptabyss (Quarter Century Secret Rare) sells for around $96.07, a PSA 9 around $57.11, against $11.56 for a raw copy. These are market prices from verified sold listings, updated daily.
Is Mermail King - Neptabyss (Quarter Century Secret Rare) worth grading?
A PSA 10 Mermail King - Neptabyss (Quarter Century Secret Rare) is worth about 8.3 times the raw price ($96.07 vs $11.56). Grading pays off when the gap covers the grading fee and the risk of a 9 ($57.11): at this price it usually does for a clean, centered copy.
Is Mermail King - Neptabyss (Quarter Century Secret Rare) going up or down?
Mermail King - Neptabyss (Quarter Century Secret Rare) is down 4.6% over 30 days, up 0.3% over 7 days. The full price history is on this page.
Is Mermail King - Neptabyss (Quarter Century Secret Rare) a good investment?
TCGIndex doesn't give financial advice, but here's the data worth knowing: it sits around $11.56, down 4.6% over the last 30 days, with low volatility. Prices can move fast, so look at the trend and your own timeframe before you buy. TCGIndex publishes one Yu-Gi-Oh pick every morning; each pick becomes public 14 days later and is scored at day 30.

Other printings of Mermail King - Neptabyss

Mermail King - Neptabyss has 6 other priced printings, from $0.21 to $1.44. Cheapest first.

More cards from Rage of the Abyss

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Priced near Mermail King - Neptabyss (Quarter Century Secret Rare) in Rage of the Abyss

Centur-Ion Chimerea (Quarter Century Secret Rare)Surfacing Big Jaws (Quarter Century Secret Rare)Mimighoul Charm (Quarter Century Secret Rare)Red-Eyes Black Fullmetal Dragon
View the full Rage of the Abyss set →