Storyline
It's Captain America versus Namor, the Sub-Mariner! Read as Marvel takes you back to 1941, before the Invaders formed. Plus: Namor attacks President Roosevelt! Can Cap hope to calm the Sub-Mariner before America goes to war with Atlantis?
Captain America #423
Captain America #423
Value & Price Guide by CGC Grade
Free • Takes 10 seconds • No credit card required
Grade
Fair Value
🔒
Unlock Full Details
Track value changes, compare CGC grades, and spot comics below fair
value for Captain America #423 CGC 9.8.
Sign Up
Free
Already a member? Sign
in.
🔒
Unlock Full Details
Track value changes, compare CGC grades, and spot comics below fair
value for Captain America #423 CGC 9.6.
Sign Up
Free
Already a member? Sign
in.
🔒
Unlock Full Details
Track value changes, compare CGC grades, and spot comics below fair
value for Captain America #423 CGC 9.4.
Sign Up
Free
Already a member? Sign
in.
🔒
Unlock Full Details
Track value changes, compare CGC grades, and spot comics below fair
value for Captain America #423 CGC 9.2.
Sign Up
Free
Already a member? Sign
in.
Captain America
#423
CGC Grade 9.0
CGC Grade 9.0
Fair Value
$22
Estimated worth based on historical sales
Annual Growth
Inflation adjusted
-10.3%
Price Trend
Historical consistency
None/Very Weak
Recent Market Averages
1 Year Avg
1 sold
$22
90 Day Avg
1 sold
$22
30 Day Avg
1 sold
$22
Market Context
Last Sale
Aug 2026
$22
Years Tracked
Historical coverage
8
Days to Sale
Avg between sales
2794
🔒
Unlock full sales history
See verified sales, price movement, and historical market activity for Captain America #423 CGC 9.0.
Sign Up FreeFree • Takes 10 seconds • No credit
card
required
🔒
Unlock comics for sale
See active listings for Captain America #423 CGC 9.0 and compare asking prices against Underval’s fair value estimate.
Sign Up Free
Find listings faster with a free account.
🔒
Unlock Full Details
Track value changes, compare CGC grades, and spot comics below fair
value for Captain America #423 CGC 8.5.
Sign Up
Free
Already a member? Sign
in.
Captain America
#423
CGC Grade 8.0
CGC Grade 8.0
No sales have been tracked for this grade.
Fair Value
—
Estimated worth based on historical sales
Annual Growth
Inflation adjusted
—
Price Trend
Historical consistency
—
Recent Market Averages
1 Year Avg
sold
—
90 Day Avg
sold
—
30 Day Avg
sold
—
Market Context
Last Sale
Date unavailable
—
Years Tracked
Historical coverage
—
Days to Sale
Avg between sales
—
🔒
Unlock full sales history
See verified sales, price movement, and historical market activity for Captain America #423 CGC 8.0.
Sign Up FreeFree • Takes 10 seconds • No credit
card
required
🔒
Unlock comics for sale
See active listings for Captain America #423 CGC 8.0 and compare asking prices against Underval’s fair value estimate.
Sign Up Free
Find listings faster with a free account.
Captain America
#423
CGC Grade 7.5
CGC Grade 7.5
No sales have been tracked for this grade.
Fair Value
—
Estimated worth based on historical sales
Annual Growth
Inflation adjusted
—
Price Trend
Historical consistency
—
Recent Market Averages
1 Year Avg
sold
—
90 Day Avg
sold
—
30 Day Avg
sold
—
Market Context
Last Sale
Date unavailable
—
Years Tracked
Historical coverage
—
Days to Sale
Avg between sales
—
🔒
Unlock full sales history
See verified sales, price movement, and historical market activity for Captain America #423 CGC 7.5.
Sign Up FreeFree • Takes 10 seconds • No credit
card
required
🔒
Unlock comics for sale
See active listings for Captain America #423 CGC 7.5 and compare asking prices against Underval’s fair value estimate.
Sign Up Free
Find listings faster with a free account.
🔒
Unlock Full Details
Track value changes, compare CGC grades, and spot comics below fair
value for Captain America #423 CGC 7.0.
Sign Up
Free
Already a member? Sign
in.
🔒
Unlock Full Details
Track value changes, compare CGC grades, and spot comics below fair
value for Captain America #423 CGC 6.5.
Sign Up
Free
Already a member? Sign
in.
🔒
Unlock Full Details
Track value changes, compare CGC grades, and spot comics below fair
value for Captain America #423 CGC 6.0.
Sign Up
Free
Already a member? Sign
in.
🔒
Unlock Full Details
Track value changes, compare CGC grades, and spot comics below fair
value for Captain America #423 CGC 5.5.
Sign Up
Free
Already a member? Sign
in.
🔒
Unlock Full Details
Track value changes, compare CGC grades, and spot comics below fair
value for Captain America #423 CGC 5.0.
Sign Up
Free
Already a member? Sign
in.
Captain America
#423
CGC Grade 4.5
CGC Grade 4.5
No sales have been tracked for this grade.
Fair Value
—
Estimated worth based on historical sales
Annual Growth
Inflation adjusted
—
Price Trend
Historical consistency
—
Recent Market Averages
1 Year Avg
sold
—
90 Day Avg
sold
—
30 Day Avg
sold
—
Market Context
Last Sale
Date unavailable
—
Years Tracked
Historical coverage
—
Days to Sale
Avg between sales
—
🔒
Unlock full sales history
See verified sales, price movement, and historical market activity for Captain America #423 CGC 4.5.
Sign Up FreeFree • Takes 10 seconds • No credit
card
required
🔒
Unlock comics for sale
See active listings for Captain America #423 CGC 4.5 and compare asking prices against Underval’s fair value estimate.
Sign Up Free
Find listings faster with a free account.
Captain America
#423
CGC Grade 4.0
CGC Grade 4.0
No sales have been tracked for this grade.
Fair Value
—
Estimated worth based on historical sales
Annual Growth
Inflation adjusted
—
Price Trend
Historical consistency
—
Recent Market Averages
1 Year Avg
sold
—
90 Day Avg
sold
—
30 Day Avg
sold
—
Market Context
Last Sale
Date unavailable
—
Years Tracked
Historical coverage
—
Days to Sale
Avg between sales
—
🔒
Unlock full sales history
See verified sales, price movement, and historical market activity for Captain America #423 CGC 4.0.
Sign Up FreeFree • Takes 10 seconds • No credit
card
required
🔒
Unlock comics for sale
See active listings for Captain America #423 CGC 4.0 and compare asking prices against Underval’s fair value estimate.
Sign Up Free
Find listings faster with a free account.
Captain America
#423
CGC Grade 3.5
CGC Grade 3.5
No sales have been tracked for this grade.
Fair Value
—
Estimated worth based on historical sales
Annual Growth
Inflation adjusted
—
Price Trend
Historical consistency
—
Recent Market Averages
1 Year Avg
sold
—
90 Day Avg
sold
—
30 Day Avg
sold
—
Market Context
Last Sale
Date unavailable
—
Years Tracked
Historical coverage
—
Days to Sale
Avg between sales
—
🔒
Unlock full sales history
See verified sales, price movement, and historical market activity for Captain America #423 CGC 3.5.
Sign Up FreeFree • Takes 10 seconds • No credit
card
required
🔒
Unlock comics for sale
See active listings for Captain America #423 CGC 3.5 and compare asking prices against Underval’s fair value estimate.
Sign Up Free
Find listings faster with a free account.
🔒
Unlock Full Details
Track value changes, compare CGC grades, and spot comics below fair
value for Captain America #423 CGC 3.0.
Sign Up
Free
Already a member? Sign
in.
🔒
Unlock Full Details
Track value changes, compare CGC grades, and spot comics below fair
value for Captain America #423 CGC 2.5.
Sign Up
Free
Already a member? Sign
in.
Captain America
#423
CGC Grade 2.0
CGC Grade 2.0
No sales have been tracked for this grade.
Fair Value
—
Estimated worth based on historical sales
Annual Growth
Inflation adjusted
—
Price Trend
Historical consistency
—
Recent Market Averages
1 Year Avg
sold
—
90 Day Avg
sold
—
30 Day Avg
sold
—
Market Context
Last Sale
Date unavailable
—
Years Tracked
Historical coverage
—
Days to Sale
Avg between sales
—
🔒
Unlock full sales history
See verified sales, price movement, and historical market activity for Captain America #423 CGC 2.0.
Sign Up FreeFree • Takes 10 seconds • No credit
card
required
🔒
Unlock comics for sale
See active listings for Captain America #423 CGC 2.0 and compare asking prices against Underval’s fair value estimate.
Sign Up Free
Find listings faster with a free account.
Captain America
#423
CGC Grade 1.8
CGC Grade 1.8
No sales have been tracked for this grade.
Fair Value
—
Estimated worth based on historical sales
Annual Growth
Inflation adjusted
—
Price Trend
Historical consistency
—
Recent Market Averages
1 Year Avg
sold
—
90 Day Avg
sold
—
30 Day Avg
sold
—
Market Context
Last Sale
Date unavailable
—
Years Tracked
Historical coverage
—
Days to Sale
Avg between sales
—
🔒
Unlock full sales history
See verified sales, price movement, and historical market activity for Captain America #423 CGC 1.8.
Sign Up FreeFree • Takes 10 seconds • No credit
card
required
🔒
Unlock comics for sale
See active listings for Captain America #423 CGC 1.8 and compare asking prices against Underval’s fair value estimate.
Sign Up Free
Find listings faster with a free account.
Captain America
#423
CGC Grade 1.5
CGC Grade 1.5
No sales have been tracked for this grade.
Fair Value
—
Estimated worth based on historical sales
Annual Growth
Inflation adjusted
—
Price Trend
Historical consistency
—
Recent Market Averages
1 Year Avg
sold
—
90 Day Avg
sold
—
30 Day Avg
sold
—
Market Context
Last Sale
Date unavailable
—
Years Tracked
Historical coverage
—
Days to Sale
Avg between sales
—
🔒
Unlock full sales history
See verified sales, price movement, and historical market activity for Captain America #423 CGC 1.5.
Sign Up FreeFree • Takes 10 seconds • No credit
card
required
🔒
Unlock comics for sale
See active listings for Captain America #423 CGC 1.5 and compare asking prices against Underval’s fair value estimate.
Sign Up Free
Find listings faster with a free account.
Captain America
#423
CGC Grade 1.0
CGC Grade 1.0
No sales have been tracked for this grade.
Fair Value
—
Estimated worth based on historical sales
Annual Growth
Inflation adjusted
—
Price Trend
Historical consistency
—
Recent Market Averages
1 Year Avg
sold
—
90 Day Avg
sold
—
30 Day Avg
sold
—
Market Context
Last Sale
Date unavailable
—
Years Tracked
Historical coverage
—
Days to Sale
Avg between sales
—
🔒
Unlock full sales history
See verified sales, price movement, and historical market activity for Captain America #423 CGC 1.0.
Sign Up FreeFree • Takes 10 seconds • No credit
card
required
🔒
Unlock comics for sale
See active listings for Captain America #423 CGC 1.0 and compare asking prices against Underval’s fair value estimate.
Sign Up Free
Find listings faster with a free account.
Captain America
#423
CGC Grade 0.5
CGC Grade 0.5
No sales have been tracked for this grade.
Fair Value
—
Estimated worth based on historical sales
Annual Growth
Inflation adjusted
—
Price Trend
Historical consistency
—
Recent Market Averages
1 Year Avg
sold
—
90 Day Avg
sold
—
30 Day Avg
sold
—
Market Context
Last Sale
Date unavailable
—
Years Tracked
Historical coverage
—
Days to Sale
Avg between sales
—
🔒
Unlock full sales history
See verified sales, price movement, and historical market activity for Captain America #423 CGC 0.5.
Sign Up FreeFree • Takes 10 seconds • No credit
card
required
🔒
Unlock comics for sale
See active listings for Captain America #423 CGC 0.5 and compare asking prices against Underval’s fair value estimate.
Sign Up Free
Find listings faster with a free account.
Want to compare every CGC grade?
Create a free Underval account to compare grades, track value changes, and find comics listed below fair value.
Compare Every CGC Grade for FreeQuick Insights on Captain America #423 in 2026
When was the last recorded sale for Captain America #423?
The last recorded sale was a CGC 9.0 for $22 on 08/03/2026 at eBay.
What was the highest sale recorded for Captain America #423?
The highest recorded sale was a CGC 9.0 for $40 on 12/09/2018 at eBay.
What was the lowest sale recorded for Captain America #423?
The lowest recorded sale was a CGC 9.0 for $22 on 08/03/2026 at eBay.
Which grade has the best annual growth for Captain America #423?
A CGC 9.0 shows the highest inflation-adjusted growth at -10.6% over 2018–2026 (8 years).
How often does Captain America #423 sell?
Average days to sell vary by grade (~every 2794–2794 days by grade), ranging from CGC 9.0 every 2794 days to CGC 9.0 every 2794 days.
Use Underval to Research Captain America #423
Compare CGC grades, understand the market data, and find listings priced below fair value.
1. Research Captain America #423
Search Captain America #423 and other comics to explore grade-level values, recent sales, and market activity.
2. Compare CGC Grades
Compare fair value, recent sales, growth, liquidity, and long-term performance across the tracked grades for Captain America #423.
3. Find Buying Opportunities
Find listings for Captain America #423 and other comics, then quickly compare asking prices against Underval’s estimated fair values.
Track Values & Compare Grades Free
Join hundreds of collectors already using Underval!
0 searches
Last searched: 2026-08-20