TCGIndexTCGIndex
Gem-Knight Master Diamond
Yu-Gi-Oh · Secret Rare

Gem-Knight Master Diamond

$1.43
+$0.05+3.3% · 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
Healthy
Well supported
Confidence
79/100
High reliability
Liquidity
Low
Thin market
Sales Volume
26 / yr
Sold per year, updated 2h ago
Buy

We may earn a commission from qualifying purchases made through our eBay & TCGplayer links.

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.

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$1.43
7-Day Change+0.0%
90-Day Change-4.0%
LiquidityLow
Market TrendStable
Price by Grade
BGS 10$73·
PSA 10$56·
SGC 10$34·
CGC 10$23·
PSA 9$12·
Raw· 26 sales$1·
Price by Condition · 8
Anchored to market price · condition spread from TCGplayer
Near Mint
1st Edition · English
$1.43
+0.8%
Near Mint
Unlimited · English
$1.16
+14.8%
Lightly Played
1st Edition · English
$1.14
+2.1%
Lightly Played
Unlimited · English
$1.05
+3.4%
Moderately Played
1st Edition · English
$0.78
-5.6%
Moderately Played
Unlimited · English
$1.15
-13.8%
Heavily Played
1st Edition · English
$0.46
-18.4%
Damaged
1st Edition · English
$0.46
+0.0%

Gem-Knight Master Diamond price history

Near Mint market price on the dates below, from TCGIndex's daily record (68 days tracked). High $1.57 on Jan 2026, low $1.18 on Oct 2026.

WhenPricevs today
Today$1.24
7 days ago$1.22+1.6%
30 days ago$1.20+3.3%
90 days ago$1.29-3.9%
6 months ago$1.54-19.5%
MonthMonth-end price
Jan 2026$1.57
Feb 2026$1.57
Mar 2026$1.49
Apr 2026$1.45
May 2026$1.50
Jun 2026$1.40
Jul 2026$1.33
Aug 2026$1.25
Sep 2026$1.20
Oct 2026$1.22
Nov 2026$1.24

Gem-Knight Master Diamond PSA 10 price and graded values

What Gem-Knight Master Diamond (Hidden Arsenal 7: Knight of Stars) sells for by grade, from verified sold listings. A PSA 10 sells for $56.37 against $1.43 raw, a 39x grading premium. PSA 9 copies trade around $11.50.

GradeMarket price
Raw (ungraded)$1.43
PSA 9$11.50
CGC 10$23.00
SGC 10$34.00
PSA 10$56.37
BGS 10$73.00

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

Gem-Knight Master Diamond FAQ

How much is Gem-Knight Master Diamond worth right now?
Gem-Knight Master Diamond from Hidden Arsenal 7: Knight of Stars is trading around $1.43 raw (ungraded) on the secondary market, and around $56.37 as a PSA 10. TCGIndex refreshes this price every day.
How much is Gem-Knight Master Diamond PSA 10 worth?
A PSA 10 Gem-Knight Master Diamond sells for around $56.37, a PSA 9 around $11.50, against $1.43 for a raw copy. These are market prices from verified sold listings, updated daily.
Is Gem-Knight Master Diamond worth grading?
A PSA 10 Gem-Knight Master Diamond is worth about 39 times the raw price ($56.37 vs $1.43). Grading pays off when the gap covers the grading fee and the risk of a 9 ($11.50): at $1.43 raw the grading fee costs more than the card itself, so it pays only for a copy you expect to come back a 10.
Is Gem-Knight Master Diamond going up or down?
Gem-Knight Master Diamond is up 3.3% over 30 days, unchanged over 7 days. The full price history is on this page.
Is Gem-Knight Master Diamond a good investment?
TCGIndex doesn't give financial advice, but here's the data worth knowing: it sits around $1.43, up 3.3% 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.