Unleash the power of Underval
Here’s how it works — in just three easy steps.
1. Start by searching your favorite comic
Search by title and issue to explore market data, sales history, and real-time pricing trends for each grade.
2. Discover valuable insights
Gain insight into key metrics such as Fair Value, Compound Annual Growth Rate (CAGR), and time-based average sale prices by issue and grade.
3. Find comics listed below fair value
Quickly find comics priced below fair value across the web through auction sites such as eBay, Reece's Rare Comics, and more, based on recent market data.
Why Underval?
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Deep Sales Coverage
We aggregate public sales of 20+ years from major auction houses and normalize by issue + grade to keep comps clean.
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Actionable Metrics by Grade
Fair Value, inflation-adjusted CAGR (annual growth rate), 30/90/365-day averages, liquidity, correlations, and fair value confidence scores.
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Find Deals Fast
Surface listings screened as below fair value to save time and money.
Become a smarter collector
- Analyze estimated worth (Fair Value) and deep sales history of 20+ years by grade
- Compare issues side-by-side to determine which one may offer better value
- Save time searching by discovering comics below fair value instantly
- View 5-30 year forward-looking estimates and gain insights using AI
Join hundreds of collectors already using Underval!
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Frequently Asked Questions (FAQs)
What separates Underval from other services?
Our innovative platform goes beyond traditional price guides and fair market value assessments. We provide users with data-driven insights, helping them identify comics listed below fair value based on recent market data. With key metrics such as Compound Annual Growth Rate (CAGR), relative sales volume, and more, you can better understand market trends and make informed collecting decisions in the ever-evolving comic book market.
What is a comic book price guide?
A reference showing estimated values by grade based on sales history, with trends, annual growth rate, and liquidity context.
Which types of comics does Underval focus on?
We primarily focus on CGC Universal Grade comics from the Golden, Silver, Bronze, Copper and Modern Ages.
Does Underval include raw and graded comics in their analytics?
Underval only tracks CGC Universal Grade comics that have been sold on the web.
How much does it cost to become an Underval member?
It's free to become an Underval member. If interested, you can sign up here.
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.