Price history & market evidence
PriceCharting guide history
Dated guide estimates for this edition, separate from completed sales.
1 dated observation—one point does not establish a trend. Last recorded 2026-10-06. Source record #2424539
Price observations belong to this edition. Guide estimates, catalog references and completed sales are separate kinds of evidence.
| Grade | Amount | Evidence | Recorded |
|---|---|---|---|
| 10.0 | $2,050.00 | PANEL_PROFITS · grade_10_0_valueguide | 1961-08-01 |
| 4.0 | $14.99 | PANEL_PROFITS · grade_4_0_valueguide | 1961-08-01 |
| 6.0 | $81.00 | PANEL_PROFITS · grade_6_0_valueguide | 1961-08-01 |
| 9.2 | $1,576.98 | PANEL_PROFITS · grade_9_2_valueguide | 1961-08-01 |
| 9.6 | $1,735.00 | PANEL_PROFITS · grade_9_6_valueguide | 1961-08-01 |
| 9.8 | $107.88 | PANEL_PROFITS · grade_9_8_valueguide | 1961-08-01 |
| RAW | $10.24 | PANEL_PROFITS · ungraded_valueguide | 1961-08-01 |
| 8.0 | $237.23 | PANEL_PROFITS · grade_8_0_valueguide | 1961-08-01 |
| 7.5 | $120.00 | 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 8 guide observations and 1 catalog references. These are reference values, not guaranteed sale proceeds.
Graded population
CGC records 28 graded copies for Challengers of the Unknown #21 (1961). Population is the number recorded by this grading source, not the total print run or all surviving copies.
The Weird World That Didn't Exist
| StoryTitle2 = The Challengers' Space-Pet Ally | Synopsis2 =
| StoryTitle3 = Mad Monarch of Burning Mountain | Synopsis =
| Appearing1 = **Featured Characters:** * Challengers of the Unknown) ** Walter Haley) ** Lester Davis) ** Matthew Ryan) ** Kyle Morgan) **Supporting Characters:** * **Antagonists:** * **Other Characters:** * **Locations:** * **Items:** * **Vehicles:** *
Creative credits
Writers: Ed Herron, Dave Wood
Interior art: Bob Brown, Bob Brown
Source records & attribution
Panel Profits keeps each source identity attached to its edition record.
COMICBASE: comicbase:224117
GCD: 16370
PANEL PROFITS: 2424539