If this still feels unclear, that’s not your fault
Fantastic Four #10 is a perfect example of why comic buying decisions feel harder than
they should.
Some grades quietly compound while others stall.
Price can look reasonable and still be misleading.
And what feels “stable” on a price guide often hides risk that only shows up later.
I struggled with this for years — even on iconic books like this one.
The issue wasn’t access to more data.
It was misreading the signals that actually matter when deciding if — and how — to buy.
I documented the framework I now use to make these calls — the same thinking behind Underval’s
fair-value logic.
Join hundreds of collectors already using Underval!
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 $22705
based on 3 sales over ~3 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 9.8 value,
CGC 9.8 price, Fantastic Four #10 worth.
What is Fantastic Four #10 CGC 9.6 worth in 2026?
Estimated worth (Fair Value) is $13200
based on 8 sales over ~13 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 9.6 value,
CGC 9.6 price, Fantastic Four #10 worth.
What is Fantastic Four #10 CGC 9.4 worth in 2026?
Estimated worth (Fair Value) is $10200
based on 12 sales over ~16 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 9.4 value,
CGC 9.4 price, Fantastic Four #10 worth.
What is Fantastic Four #10 CGC 9.2 worth in 2026?
Estimated worth (Fair Value) is $5000
based on 8 sales over ~22 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 9.2 value,
CGC 9.2 price, Fantastic Four #10 worth.
What is Fantastic Four #10 CGC 9.0 worth in 2026?
Estimated worth (Fair Value) is $1860
based on 14 sales over ~17 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 9.0 value,
CGC 9.0 price, Fantastic Four #10 worth.
What is Fantastic Four #10 CGC 8.5 worth in 2026?
Estimated worth (Fair Value) is $1820
based on 23 sales over ~23 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 8.5 value,
CGC 8.5 price, Fantastic Four #10 worth.
What is Fantastic Four #10 CGC 8.0 worth in 2026?
Estimated worth (Fair Value) is $1868
based on 16 sales over ~19 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 8.0 value,
CGC 8.0 price, Fantastic Four #10 worth.
What is Fantastic Four #10 CGC 7.5 worth in 2026?
Estimated worth (Fair Value) is $910
based on 34 sales over ~14 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 7.5 value,
CGC 7.5 price, Fantastic Four #10 worth.
What is Fantastic Four #10 CGC 7.0 worth in 2026?
Estimated worth (Fair Value) is $735
based on 42 sales over ~23 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 7.0 value,
CGC 7.0 price, Fantastic Four #10 worth.
What is Fantastic Four #10 CGC 6.5 worth in 2026?
Estimated worth (Fair Value) is $667
based on 44 sales over ~24 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 6.5 value,
CGC 6.5 price, Fantastic Four #10 worth.
What is Fantastic Four #10 CGC 6.0 worth in 2026?
Estimated worth (Fair Value) is $526
based on 46 sales over ~23 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 6.0 value,
CGC 6.0 price, Fantastic Four #10 worth.
What is Fantastic Four #10 CGC 5.5 worth in 2026?
Estimated worth (Fair Value) is $442
based on 34 sales over ~23 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 5.5 value,
CGC 5.5 price, Fantastic Four #10 worth.
What is Fantastic Four #10 CGC 5.0 worth in 2026?
Estimated worth (Fair Value) is $376
based on 58 sales over ~21 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 5.0 value,
CGC 5.0 price, Fantastic Four #10 worth.
What is Fantastic Four #10 CGC 4.5 worth in 2026?
Estimated worth (Fair Value) is $340
based on 60 sales over ~20 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 4.5 value,
CGC 4.5 price, Fantastic Four #10 worth.
What is Fantastic Four #10 CGC 4.0 worth in 2026?
Estimated worth (Fair Value) is $327
based on 71 sales over ~22 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 4.0 value,
CGC 4.0 price, Fantastic Four #10 worth.
What is Fantastic Four #10 CGC 3.5 worth in 2026?
Estimated worth (Fair Value) is $283
based on 68 sales over ~16 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 3.5 value,
CGC 3.5 price, Fantastic Four #10 worth.
What is Fantastic Four #10 CGC 3.0 worth in 2026?
Estimated worth (Fair Value) is $257
based on 53 sales over ~23 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 3.0 value,
CGC 3.0 price, Fantastic Four #10 worth.
What is Fantastic Four #10 CGC 2.5 worth in 2026?
Estimated worth (Fair Value) is $237
based on 31 sales over ~16 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 2.5 value,
CGC 2.5 price, Fantastic Four #10 worth.
What is Fantastic Four #10 CGC 2.0 worth in 2026?
Estimated worth (Fair Value) is $124
based on 13 sales over ~14 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 2.0 value,
CGC 2.0 price, Fantastic Four #10 worth.
What is Fantastic Four #10 CGC 1.8 worth in 2026?
Estimated worth (Fair Value) is $175
based on 7 sales over ~5 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 1.8 value,
CGC 1.8 price, Fantastic Four #10 worth.
What is Fantastic Four #10 CGC 1.5 worth in 2026?
Estimated worth (Fair Value) is $300
based on 5 sales over ~4 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 1.5 value,
CGC 1.5 price, Fantastic Four #10 worth.
What is Fantastic Four #10 CGC 1.0 worth in 2026?
Estimated worth (Fair Value) is $186
based on 5 sales over ~3 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 1.0 value,
CGC 1.0 price, Fantastic Four #10 worth.
What is Fantastic Four #10 CGC 0.5 worth in 2026?
Estimated worth (Fair Value) is $200
based on 3 sales over ~11 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Fantastic Four #10 CGC 0.5 value,
CGC 0.5 price, Fantastic Four #10 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.