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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 $13200
based on 3 sales over ~3 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Batman #139 CGC 9.4 value,
CGC 9.4 price, Batman #139 worth.
What is Batman #139 CGC 9.2 worth in 2026?
Estimated worth (Fair Value) is $9403
based on 2 sales over ~1 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Batman #139 CGC 9.2 value,
CGC 9.2 price, Batman #139 worth.
What is Batman #139 CGC 9.0 worth in 2026?
Estimated worth (Fair Value) is $5606
based on 2 sales over ~2 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Batman #139 CGC 9.0 value,
CGC 9.0 price, Batman #139 worth.
What is Batman #139 CGC 8.5 worth in 2026?
Estimated worth (Fair Value) is $2880
based on 5 sales over ~10 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Batman #139 CGC 8.5 value,
CGC 8.5 price, Batman #139 worth.
What is Batman #139 CGC 8.0 worth in 2026?
Estimated worth (Fair Value) is $2480
based on 18 sales over ~17 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Batman #139 CGC 8.0 value,
CGC 8.0 price, Batman #139 worth.
What is Batman #139 CGC 7.5 worth in 2026?
Estimated worth (Fair Value) is $1400
based on 12 sales over ~13 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Batman #139 CGC 7.5 value,
CGC 7.5 price, Batman #139 worth.
What is Batman #139 CGC 7.0 worth in 2026?
Estimated worth (Fair Value) is $1150
based on 19 sales over ~12 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Batman #139 CGC 7.0 value,
CGC 7.0 price, Batman #139 worth.
What is Batman #139 CGC 6.5 worth in 2026?
Estimated worth (Fair Value) is $852
based on 24 sales over ~12 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Batman #139 CGC 6.5 value,
CGC 6.5 price, Batman #139 worth.
What is Batman #139 CGC 6.0 worth in 2026?
Estimated worth (Fair Value) is $610
based on 20 sales over ~11 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Batman #139 CGC 6.0 value,
CGC 6.0 price, Batman #139 worth.
What is Batman #139 CGC 5.5 worth in 2026?
Estimated worth (Fair Value) is $489
based on 43 sales over ~13 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Batman #139 CGC 5.5 value,
CGC 5.5 price, Batman #139 worth.
What is Batman #139 CGC 5.0 worth in 2026?
Estimated worth (Fair Value) is $700
based on 25 sales over ~13 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Batman #139 CGC 5.0 value,
CGC 5.0 price, Batman #139 worth.
What is Batman #139 CGC 4.5 worth in 2026?
Estimated worth (Fair Value) is $525
based on 32 sales over ~14 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Batman #139 CGC 4.5 value,
CGC 4.5 price, Batman #139 worth.
What is Batman #139 CGC 4.0 worth in 2026?
Estimated worth (Fair Value) is $393
based on 39 sales over ~11 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Batman #139 CGC 4.0 value,
CGC 4.0 price, Batman #139 worth.
What is Batman #139 CGC 3.5 worth in 2026?
Estimated worth (Fair Value) is $365
based on 27 sales over ~9 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Batman #139 CGC 3.5 value,
CGC 3.5 price, Batman #139 worth.
What is Batman #139 CGC 3.0 worth in 2026?
Estimated worth (Fair Value) is $460
based on 25 sales over ~10 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Batman #139 CGC 3.0 value,
CGC 3.0 price, Batman #139 worth.
What is Batman #139 CGC 2.5 worth in 2026?
Estimated worth (Fair Value) is $309
based on 23 sales over ~10 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Batman #139 CGC 2.5 value,
CGC 2.5 price, Batman #139 worth.
What is Batman #139 CGC 2.0 worth in 2026?
Estimated worth (Fair Value) is $320
based on 20 sales over ~6 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Batman #139 CGC 2.0 value,
CGC 2.0 price, Batman #139 worth.
What is Batman #139 CGC 1.8 worth in 2026?
Estimated worth (Fair Value) is $280
based on 7 sales over ~5 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Batman #139 CGC 1.8 value,
CGC 1.8 price, Batman #139 worth.
What is Batman #139 CGC 1.5 worth in 2026?
Estimated worth (Fair Value) is $250
based on 2 sales over ~3 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Batman #139 CGC 1.5 value,
CGC 1.5 price, Batman #139 worth.
What is Batman #139 CGC 1.0 worth in 2026?
Estimated worth (Fair Value) is $222
based on 2 sales over ~1 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Batman #139 CGC 1.0 value,
CGC 1.0 price, Batman #139 worth.
What is Batman #139 CGC 0.5 worth in 2026?
Estimated worth (Fair Value) is $195
based on 3 sales over ~5 years
.
Informational estimate, not an offer.
Updated on
based on the last sale.
Also searched as: Batman #139 CGC 0.5 value,
CGC 0.5 price, Batman #139 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.