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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.
Estimated worth (Fair Value) is $17527
based on 2 sales over ~3 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #17 CGC 9.8 value,
CGC 9.8 price, Fantastic Four #17 worth.
What is Fantastic Four #17 CGC 9.6 worth in 2025?
Estimated worth (Fair Value) is $5214
based on 9 sales over ~11 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #17 CGC 9.6 value,
CGC 9.6 price, Fantastic Four #17 worth.
What is Fantastic Four #17 CGC 9.4 worth in 2025?
Estimated worth (Fair Value) is $3542
based on 7 sales over ~13 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #17 CGC 9.4 value,
CGC 9.4 price, Fantastic Four #17 worth.
What is Fantastic Four #17 CGC 9.2 worth in 2025?
Estimated worth (Fair Value) is $2520
based on 16 sales over ~14 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #17 CGC 9.2 value,
CGC 9.2 price, Fantastic Four #17 worth.
What is Fantastic Four #17 CGC 9.0 worth in 2025?
Estimated worth (Fair Value) is $1461
based on 9 sales over ~22 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #17 CGC 9.0 value,
CGC 9.0 price, Fantastic Four #17 worth.
What is Fantastic Four #17 CGC 8.5 worth in 2025?
Estimated worth (Fair Value) is $767
based on 18 sales over ~20 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #17 CGC 8.5 value,
CGC 8.5 price, Fantastic Four #17 worth.
What is Fantastic Four #17 CGC 8.0 worth in 2025?
Estimated worth (Fair Value) is $583
based on 32 sales over ~23 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #17 CGC 8.0 value,
CGC 8.0 price, Fantastic Four #17 worth.
What is Fantastic Four #17 CGC 7.5 worth in 2025?
Estimated worth (Fair Value) is $665
based on 18 sales over ~22 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #17 CGC 7.5 value,
CGC 7.5 price, Fantastic Four #17 worth.
What is Fantastic Four #17 CGC 7.0 worth in 2025?
Estimated worth (Fair Value) is $506
based on 40 sales over ~18 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #17 CGC 7.0 value,
CGC 7.0 price, Fantastic Four #17 worth.
What is Fantastic Four #17 CGC 6.5 worth in 2025?
Estimated worth (Fair Value) is $346
based on 26 sales over ~21 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #17 CGC 6.5 value,
CGC 6.5 price, Fantastic Four #17 worth.
What is Fantastic Four #17 CGC 6.0 worth in 2025?
Estimated worth (Fair Value) is $323
based on 40 sales over ~13 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #17 CGC 6.0 value,
CGC 6.0 price, Fantastic Four #17 worth.
What is Fantastic Four #17 CGC 5.5 worth in 2025?
Estimated worth (Fair Value) is $210
based on 27 sales over ~12 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #17 CGC 5.5 value,
CGC 5.5 price, Fantastic Four #17 worth.
What is Fantastic Four #17 CGC 5.0 worth in 2025?
Estimated worth (Fair Value) is $278
based on 22 sales over ~19 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #17 CGC 5.0 value,
CGC 5.0 price, Fantastic Four #17 worth.
What is Fantastic Four #17 CGC 4.5 worth in 2025?
Estimated worth (Fair Value) is $234
based on 27 sales over ~12 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #17 CGC 4.5 value,
CGC 4.5 price, Fantastic Four #17 worth.
What is Fantastic Four #17 CGC 4.0 worth in 2025?
Estimated worth (Fair Value) is $172
based on 37 sales over ~14 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #17 CGC 4.0 value,
CGC 4.0 price, Fantastic Four #17 worth.
What is Fantastic Four #17 CGC 3.5 worth in 2025?
Estimated worth (Fair Value) is $135
based on 27 sales over ~12 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #17 CGC 3.5 value,
CGC 3.5 price, Fantastic Four #17 worth.
What is Fantastic Four #17 CGC 3.0 worth in 2025?
Estimated worth (Fair Value) is $133
based on 20 sales over ~16 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #17 CGC 3.0 value,
CGC 3.0 price, Fantastic Four #17 worth.
What is Fantastic Four #17 CGC 2.5 worth in 2025?
Estimated worth (Fair Value) is $145
based on 14 sales over ~22 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #17 CGC 2.5 value,
CGC 2.5 price, Fantastic Four #17 worth.
What is Fantastic Four #17 CGC 2.0 worth in 2025?
Estimated worth (Fair Value) is $109
based on 8 sales over ~14 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #17 CGC 2.0 value,
CGC 2.0 price, Fantastic Four #17 worth.
What is Fantastic Four #17 CGC 1.8 worth in 2025?
Estimated worth (Fair Value) is $137
based on 4 sales over ~8 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #17 CGC 1.8 value,
CGC 1.8 price, Fantastic Four #17 worth.
What is Fantastic Four #17 CGC 1.5 worth in 2025?
Estimated worth (Fair Value) is $63
based on 4 sales over ~10 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #17 CGC 1.5 value,
CGC 1.5 price, Fantastic Four #17 worth.
What is Fantastic Four #17 CGC 1.0 worth in 2025?
Estimated worth (Fair Value) is $139
based on 3 sales over ~8 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #17 CGC 1.0 value,
CGC 1.0 price, Fantastic Four #17 worth.
Legal Disclaimer
Underval is a platform designed to provide information about the
potential value of comic books based on data analysis. We do not provide investment advice, and any information
provided on our platform is for informational purposes only. While we strive to offer accurate and reliable
data,
the decision to purchase any comic book should be based on your own research and judgment. Underval does not
guarantee the accuracy, completeness, or reliability of any information provided, and we shall not be held
liable
for any actions taken based on the content available on our platform. By using Underval, you acknowledge and
agree
to these terms.