Storyline
Scientist Alec Holland is transformed into the creature known as Swamp Thing after a laboratory explosion and a violent attack leave him trapped in a monstrous form. The issue establishes the tragic horror tone that defines the series.
Swamp Thing #1
Swamp Thing #1 worth by CGC grade ranges from $75 to $3,450.
Swamp Thing #1
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Swamp Thing
#1
CGC Grade 9.2
CGC Grade 9.2
| Fair Value | Market Ask | Growth |
|---|---|---|
| $476 | $524 | 6.0% |
| Growth (Inflation Adj) |
Years Tracked | Correlation |
|---|---|---|
| 3.4% | 19 | Strong |
| 1 Year Avg (8 sold) |
90 Day Avg (3 sold) |
30 Day Avg (2 sold) |
|---|---|---|
| $428 | $486 | $525 |
| Last Sale (Jun 2026) |
Avg Days To Sale | Sales Tracked |
|---|---|---|
| $475 | 101 | 71 |
| All Time Low (2009) |
All Time High (2023) |
Down ATH (%) |
|---|---|---|
| $131 | $768 | 38.0% |
| Sales Volume (% YTD) |
Sales Volume (YTD) |
Relative Volume (YTD) |
|---|---|---|
| 85.4% | 4 | 1.9 |
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Swamp Thing
#1
CGC Grade 9.0
CGC Grade 9.0
| Fair Value | Market Ask | Growth |
|---|---|---|
| $366 | $468 | 6.4% |
| Growth (Inflation Adj) |
Years Tracked | Correlation |
|---|---|---|
| 3.7% | 24 | Strong |
| 1 Year Avg (17 sold) |
90 Day Avg (4 sold) |
30 Day Avg (1 sold) |
|---|---|---|
| $331 | $376 | $450 |
| Last Sale (Jun 2026) |
Avg Days To Sale | Sales Tracked |
|---|---|---|
| $450 | 113 | 79 |
| All Time Low (2002) |
All Time High (2025) |
Down ATH (%) |
|---|---|---|
| $82 | $492 | 25.6% |
| Sales Volume (% YTD) |
Sales Volume (YTD) |
Relative Volume (YTD) |
|---|---|---|
| 227.3% | 6 | 3.3 |
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Swamp Thing
#1
CGC Grade 8.5
CGC Grade 8.5
| Fair Value | Market Ask | Growth |
|---|---|---|
| $303 | $392 | 9.2% |
| Growth (Inflation Adj) |
Years Tracked | Correlation |
|---|---|---|
| 6.4% | 23 | Moderate |
| 1 Year Avg (11 sold) |
90 Day Avg (4 sold) |
30 Day Avg (0 sold) |
|---|---|---|
| $290 | $318 | — |
| Last Sale (Jun 2026) |
Avg Days To Sale | Sales Tracked |
|---|---|---|
| $350 | 116 | 74 |
| All Time Low (2003) |
All Time High (2023) |
Down ATH (%) |
|---|---|---|
| $41 | $465 | 34.8% |
| Sales Volume (% YTD) |
Sales Volume (YTD) |
Relative Volume (YTD) |
|---|---|---|
| 245.0% | 6 | 3.4 |
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Swamp Thing
#1
CGC Grade 8.0
CGC Grade 8.0
Sales data shows unusual volume, with a 325.0% change in year to date sales volume compared to prior years.
| Fair Value | Market Ask | Growth |
|---|---|---|
| $240 | $341 | 9.6% |
| Growth (Inflation Adj) |
Years Tracked | Correlation |
|---|---|---|
| 6.9% | 17 | Weak |
| 1 Year Avg (12 sold) |
90 Day Avg (5 sold) |
30 Day Avg (1 sold) |
|---|---|---|
| $218 | $248 | $280 |
| Last Sale (Jun 2026) |
Avg Days To Sale | Sales Tracked |
|---|---|---|
| $280 | 107 | 59 |
| All Time Low (2009) |
All Time High (2025) |
Down ATH (%) |
|---|---|---|
| $51 | $310 | 22.6% |
| Sales Volume (% YTD) |
Sales Volume (YTD) |
Relative Volume (YTD) |
|---|---|---|
| 325.0% | 6 | 4.2 |
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Swamp Thing
#1
CGC Grade 7.5
CGC Grade 7.5
| Fair Value | Market Ask | Growth |
|---|---|---|
| $197 | $407 | 9.3% |
| Growth (Inflation Adj) |
Years Tracked | Correlation |
|---|---|---|
| 6.5% | 14 | Weak |
| 1 Year Avg (9 sold) |
90 Day Avg (0 sold) |
30 Day Avg (0 sold) |
|---|---|---|
| $197 | — | — |
| Last Sale (Mar 2026) |
Avg Days To Sale | Sales Tracked |
|---|---|---|
| $144 | 110 | 46 |
| All Time Low (2012) |
All Time High (2025) |
Down ATH (%) |
|---|---|---|
| $56 | $300 | 34.3% |
| Sales Volume (% YTD) |
Sales Volume (YTD) |
Relative Volume (YTD) |
|---|---|---|
| 76.5% | 6 | 1.8 |
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Swamp Thing
#1
CGC Grade 6.0
CGC Grade 6.0
| Fair Value | Market Ask | Growth |
|---|---|---|
| $181 | $300 | 10.0% |
| Growth (Inflation Adj) |
Years Tracked | Correlation |
|---|---|---|
| 7.1% | 3 | Moderate |
| 1 Year Avg (4 sold) |
90 Day Avg (2 sold) |
30 Day Avg (0 sold) |
|---|---|---|
| $184 | $178 | — |
| Last Sale (May 2026) |
Avg Days To Sale | Sales Tracked |
|---|---|---|
| $220 | 48 | 23 |
| All Time Low (2023) |
All Time High (2026) |
Down ATH (%) |
|---|---|---|
| $93 | $231 | 21.6% |
| Sales Volume (% YTD) |
Sales Volume (YTD) |
Relative Volume (YTD) |
|---|---|---|
| 33.3% | 4 | 1.3 |
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Swamp Thing
#1
CGC Grade 5.5
CGC Grade 5.5
| Fair Value | Market Ask | Growth |
|---|---|---|
| $161 | $220 | 3.5% |
| Growth (Inflation Adj) |
Years Tracked | Correlation |
|---|---|---|
| 0.4% | 4 | Weak |
| 1 Year Avg (7 sold) |
90 Day Avg (1 sold) |
30 Day Avg (1 sold) |
|---|---|---|
| $161 | $160 | $160 |
| Last Sale (Jun 2026) |
Avg Days To Sale | Sales Tracked |
|---|---|---|
| $160 | 49 | 27 |
| All Time Low (2023) |
All Time High (2026) |
Down ATH (%) |
|---|---|---|
| $84 | $200 | 19.5% |
| Sales Volume (% YTD) |
Sales Volume (YTD) |
Relative Volume (YTD) |
|---|---|---|
| -40.0% | 3 | 0.6 |
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Swamp Thing
#1
CGC Grade 5.0
CGC Grade 5.0
| Fair Value | Market Ask | Growth |
|---|---|---|
| $147 | $320 | 3.7% |
| Growth (Inflation Adj) |
Years Tracked | Correlation |
|---|---|---|
| 1.1% | 2 | None/Very Weak |
| 1 Year Avg (9 sold) |
90 Day Avg (3 sold) |
30 Day Avg (0 sold) |
|---|---|---|
| $145 | $151 | — |
| Last Sale (Jun 2026) |
Avg Days To Sale | Sales Tracked |
|---|---|---|
| $137 | 52 | 18 |
| All Time Low (2024) |
All Time High (2024) |
Down ATH (%) |
|---|---|---|
| $80 | $205 | 28.3% |
| Sales Volume (% YTD) |
Sales Volume (YTD) |
Relative Volume (YTD) |
|---|---|---|
| 66.7% | 5 | 1.7 |
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Swamp Thing
#1
CGC Grade 3.0
CGC Grade 3.0
| Fair Value | Market Ask | Growth |
|---|---|---|
| $75 | — | 0.0% |
| Growth (Inflation Adj) |
Years Tracked | Correlation |
|---|---|---|
| 0.0% | 1 | None/Very Weak |
| 1 Year Avg (0 sold) |
90 Day Avg (0 sold) |
30 Day Avg (0 sold) |
|---|---|---|
| — | — | — |
| Last Sale (Jul 2023) |
Avg Days To Sale | Sales Tracked |
|---|---|---|
| $75 | NA | 1 |
| All Time Low (2023) |
All Time High (2023) |
Down ATH (%) |
|---|---|---|
| $75 | $75 | 0.0% |
| Sales Volume (% YTD) |
Sales Volume (YTD) |
Relative Volume (YTD) |
|---|---|---|
| NA | 0 | 0.0 |
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Swamp Thing
#1
CGC Grade 1.0
CGC Grade 1.0
No sales have been tracked for this grade.
| Fair Value | Market Ask | Growth |
|---|---|---|
| — | — | - |
| Growth (Inflation Adj) |
Years Tracked | Correlation |
|---|---|---|
| - | - | - |
| 1 Year Avg ( sold) |
90 Day Avg ( sold) |
30 Day Avg ( sold) |
|---|---|---|
| — | — | — |
| Last Sale (-) |
Avg Days To Sale | Sales Tracked |
|---|---|---|
| — | - | 0 |
| All Time Low (-) |
All Time High (-) |
Down ATH (%) |
|---|---|---|
| — | — | - |
| Sales Volume (% YTD) |
Sales Volume (YTD) |
Relative Volume (YTD) |
|---|---|---|
| - | 0 | - |
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Swamp Thing
#1
CGC Grade 0.5
CGC Grade 0.5
No sales have been tracked for this grade.
| Fair Value | Market Ask | Growth |
|---|---|---|
| — | — | - |
| Growth (Inflation Adj) |
Years Tracked | Correlation |
|---|---|---|
| - | - | - |
| 1 Year Avg ( sold) |
90 Day Avg ( sold) |
30 Day Avg ( sold) |
|---|---|---|
| — | — | — |
| Last Sale (-) |
Avg Days To Sale | Sales Tracked |
|---|---|---|
| — | - | 0 |
| All Time Low (-) |
All Time High (-) |
Down ATH (%) |
|---|---|---|
| — | — | - |
| Sales Volume (% YTD) |
Sales Volume (YTD) |
Relative Volume (YTD) |
|---|---|---|
| - | 0 | - |
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Compare Every CGC Grade for FreeQuick Insights on Swamp Thing #1 in 2026
When was the last recorded sale for Swamp Thing #1?
The last recorded sale was a CGC 6.5 for $140 on 06/21/2026 at eBay.
What was the highest sale recorded for Swamp Thing #1?
The highest recorded sale was a CGC 9.8 for $7,000 on 12/17/2021 at Comic Connect.
What was the lowest sale recorded for Swamp Thing #1?
The lowest recorded sale was a CGC 6.5 for $31 on 09/14/2008 at Heritage Auctions [1].
Which grade has the best annual growth for Swamp Thing #1?
A CGC 8.0 shows the highest inflation-adjusted growth at 6.9% over 2009–2026 (17 years).
How often does Swamp Thing #1 sell?
Average days to sell vary by grade (~every 48–379 days by grade), ranging from CGC 6.0 every 48 days to CGC 3.5 every 379 days.
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Frequently Asked Questions
What is Underval?
Underval is a free comic-book analytics and listings platform. We estimate fair value by grade, display annual growth rate, show recent sales and sales history, and surface active listings.
Where do your sales come from?
We aggregate public online sales from major marketplaces and auctions such as eBay and Heritage Auctions, then normalize and de-duplicate them by issue and grade.
How do you calculate “Estimated Worth (Fair Value)?”
Fair value blends recent realized sales with longer-term trends, outlier filtering, and grade-level liquidity. It’s an informational estimate, not an offer.
How often are values updated?
Values update as new sales appear. Each grade’s “Updated on” date reflects the most recent sale we’ve matched for that grade.
Which grades do you cover?
We track Universal CGC-graded copies across common scale points (e.g., 0.5–10). Availability varies by issue and observed market activity.
Do you offer investment advice?
No. Underval provides data and estimates for research purposes only. Always do your own diligence before buying or selling.
45 searches
Last searched: 2026-06-24
Price guide FAQ
Fair Value by CGC Grade — Swamp Thing #1
What is Swamp Thing #1 CGC 9.8 worth in 2026?
Estimated worth (Fair Value) is $3450
based on 21 sales over ~20 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Swamp Thing #1 CGC 9.8 value, CGC 9.8 price, Swamp Thing #1 worth.
What is Swamp Thing #1 CGC 9.6 worth in 2026?
Estimated worth (Fair Value) is $946
based on 54 sales over ~24 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Swamp Thing #1 CGC 9.6 value, CGC 9.6 price, Swamp Thing #1 worth.
What is Swamp Thing #1 CGC 9.4 worth in 2026?
Estimated worth (Fair Value) is $567
based on 72 sales over ~24 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Swamp Thing #1 CGC 9.4 value, CGC 9.4 price, Swamp Thing #1 worth.
What is Swamp Thing #1 CGC 9.2 worth in 2026?
Estimated worth (Fair Value) is $476
based on 71 sales over ~19 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Swamp Thing #1 CGC 9.2 value, CGC 9.2 price, Swamp Thing #1 worth.
What is Swamp Thing #1 CGC 9.0 worth in 2026?
Estimated worth (Fair Value) is $366
based on 79 sales over ~24 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Swamp Thing #1 CGC 9.0 value, CGC 9.0 price, Swamp Thing #1 worth.
What is Swamp Thing #1 CGC 8.5 worth in 2026?
Estimated worth (Fair Value) is $303
based on 74 sales over ~23 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Swamp Thing #1 CGC 8.5 value, CGC 8.5 price, Swamp Thing #1 worth.
What is Swamp Thing #1 CGC 8.0 worth in 2026?
Estimated worth (Fair Value) is $240
based on 59 sales over ~17 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Swamp Thing #1 CGC 8.0 value, CGC 8.0 price, Swamp Thing #1 worth.
What is Swamp Thing #1 CGC 7.5 worth in 2026?
Estimated worth (Fair Value) is $197
based on 46 sales over ~14 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Swamp Thing #1 CGC 7.5 value, CGC 7.5 price, Swamp Thing #1 worth.
What is Swamp Thing #1 CGC 7.0 worth in 2026?
Estimated worth (Fair Value) is $172
based on 53 sales over ~20 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Swamp Thing #1 CGC 7.0 value, CGC 7.0 price, Swamp Thing #1 worth.
What is Swamp Thing #1 CGC 6.5 worth in 2026?
Estimated worth (Fair Value) is $139
based on 34 sales over ~18 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Swamp Thing #1 CGC 6.5 value, CGC 6.5 price, Swamp Thing #1 worth.
What is Swamp Thing #1 CGC 6.0 worth in 2026?
Estimated worth (Fair Value) is $181
based on 23 sales over ~3 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Swamp Thing #1 CGC 6.0 value, CGC 6.0 price, Swamp Thing #1 worth.
What is Swamp Thing #1 CGC 5.5 worth in 2026?
Estimated worth (Fair Value) is $161
based on 27 sales over ~4 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Swamp Thing #1 CGC 5.5 value, CGC 5.5 price, Swamp Thing #1 worth.
What is Swamp Thing #1 CGC 5.0 worth in 2026?
Estimated worth (Fair Value) is $147
based on 18 sales over ~2 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Swamp Thing #1 CGC 5.0 value, CGC 5.0 price, Swamp Thing #1 worth.
What is Swamp Thing #1 CGC 4.5 worth in 2026?
Estimated worth (Fair Value) is $150
based on 2 sales over ~1 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Swamp Thing #1 CGC 4.5 value, CGC 4.5 price, Swamp Thing #1 worth.
What is Swamp Thing #1 CGC 4.0 worth in 2026?
Estimated worth (Fair Value) is $88
based on 8 sales over ~4 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Swamp Thing #1 CGC 4.0 value, CGC 4.0 price, Swamp Thing #1 worth.
What is Swamp Thing #1 CGC 3.5 worth in 2026?
Estimated worth (Fair Value) is $66
based on 2 sales over ~1 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Swamp Thing #1 CGC 3.5 value, CGC 3.5 price, Swamp Thing #1 worth.
What is Swamp Thing #1 CGC 3.0 worth in 2026?
Estimated worth (Fair Value) is $75
based on 1 sales over ~1 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Swamp Thing #1 CGC 3.0 value, CGC 3.0 price, Swamp Thing #1 worth.
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