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 #2426123
Price observations belong to this edition. Guide estimates, catalog references and completed sales are separate kinds of evidence.
| Grade | Amount | Evidence | Recorded |
|---|---|---|---|
| 8.0 | $140.01 | PANEL_PROFITS · grade_8_0_valueguide | 1960-04-01 |
| 9.2 | $378.79 | PANEL_PROFITS · grade_9_2_valueguide | 1960-04-01 |
| 9.6 | $2,887.00 | PANEL_PROFITS · grade_9_6_valueguide | 1960-04-01 |
| 9.8 | $2,624.40 | PANEL_PROFITS · grade_9_8_valueguide | 1960-04-01 |
| RAW | $15.18 | PANEL_PROFITS · ungraded_valueguide | 1960-04-01 |
| 10.0 | $3,412.00 | PANEL_PROFITS · grade_10_0_valueguide | 1960-04-01 |
| 4.0 | $30.00 | PANEL_PROFITS · grade_4_0_valueguide | 1960-04-01 |
| 6.0 | $74.13 | PANEL_PROFITS · grade_6_0_valueguide | 1960-04-01 |
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 0 catalog references. These are reference values, not guaranteed sale proceeds.
Graded population
CGC records 14 graded copies for My Greatest Adventure #42 (1960). Population is the number recorded by this grading source, not the total print run or all surviving copies.
My Brother Was a Robot
| StoryTitle2 = I Became A Marauding Mermaid
Creative credits
Interior art: Lee Elias, Ruben Moreira, Murphy Anderson
Source records & attribution
Panel Profits keeps each source identity attached to its edition record.
COMICBASE: comicbase:775168
GCD: 15585
PANEL PROFITS: 2426123