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 #2405258
Price observations belong to this edition. Guide estimates, catalog references and completed sales are separate kinds of evidence.
| Grade | Amount | Evidence | Recorded |
|---|---|---|---|
| 10.0 | $1,930.00 | PANEL_PROFITS · grade_10_0_valueguide | 1965-06-01 |
| 4.0 | $13.00 | PANEL_PROFITS · grade_4_0_valueguide | 1965-06-01 |
| 6.0 | $38.10 | PANEL_PROFITS · grade_6_0_valueguide | 1965-06-01 |
| 8.0 | $95.00 | PANEL_PROFITS · grade_8_0_valueguide | 1965-06-01 |
| 9.2 | $159.97 | PANEL_PROFITS · grade_9_2_valueguide | 1965-06-01 |
| 9.4 | $172.75 | PANEL_PROFITS · grade_9_4_valueguide | 1965-06-01 |
| 9.6 | $1,633.00 | PANEL_PROFITS · grade_9_6_valueguide | 1965-06-01 |
| 9.8 | $1,484.61 | PANEL_PROFITS · grade_9_8_valueguide | 1965-06-01 |
| RAW | $8.77 | PANEL_PROFITS · ungraded_valueguide | 1965-06-01 |
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 9 guide observations and 0 catalog references. These are reference values, not guaranteed sale proceeds.
Graded population
CGC records 41 graded copies for Superboy #121 (1965). Population is the number recorded by this grading source, not the total print run or all surviving copies.
Clark Kent's Single Identity!
The Phantom Zone villains cause Superboy) to lose his powers through an exposure to Red and Green Kryptonite. When they bargain for their release in return for Professor Vakox) restoring Superboy's powers, he releases only Vakox. Threatened with Green Kryptonite, Vakox is forced to concoct the antidote. After Superboy's powers are restored, he sends Vakox back to the Zone.
Creative credits
Writers: Otto Binder, Otto Binder
Interior art: George Papp, Curt Swan
Source records & attribution
Panel Profits keeps each source identity attached to its edition record.
GCD: 19221
PANEL PROFITS: 2405258