Price history & market evidence
PriceCharting guide history
Dated guide estimates for this edition, separate from completed sales.
2 dated observations. Last recorded 2026-11-01. Source record #2426885
Price observations belong to this edition. Guide estimates, catalog references and completed sales are separate kinds of evidence.
| Grade | Amount | Evidence | Recorded |
|---|---|---|---|
| 9.2 | $1,560.00 | PANEL_PROFITS · grade_9_2_valueguide | 1959-10-01 |
| RAW | $24.47 | PANEL_PROFITS · ungraded_valueguide | 1959-10-01 |
| 9.2 | $265.00 | ComicBase · catalog referencecatalog | Date not recorded |
Reading this edition’s market
Compare the same cover, printing and grade before setting a bid. A raw guide or a higher-grade price does not establish a slab’s value. Include selling fees, shipping and the depth of completed-sale evidence when assessing an exit price.
The table includes 2 guide observations and 1 catalog references. These are reference values, not guaranteed sale proceeds.
Graded population
CGC records 23 graded copies for Tales of the Unexpected #42 (1959). Population is the number recorded by this grading source, not the total print run or all surviving copies.
The Secret of the Martian Helmet
| StoryTitle2 = The Creature Who Hated Earth | Synopsis2 =
| StoryTitle3 = The Son of King Xanta | Synopsis3 =
| Appearing1 = **Featured Characters:** * Space Ranger) **Supporting Characters:** * **Antagonists:** * **Other Characters:** * **Locations:** * **Items:** * **Vehicles:** *
| Notes = | Trivia = | Recommended = | Links =
Creative credits
Interior art: Jim Mooney, George Roussos, Lee Elias
Source records & attribution
Panel Profits keeps each source identity attached to its edition record.
COMICBASE: comicbase:1071491
GCD: 15278
PANEL PROFITS: 2426885