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 #2317318
Price observations belong to this edition. Guide estimates, catalog references and completed sales are separate kinds of evidence.
| Grade | Amount | Evidence | Recorded |
|---|---|---|---|
| 4.0 | $9.44 | PANEL_PROFITS · grade_4_0_valueguide | 1975-08-01 |
| 6.0 | $20.89 | PANEL_PROFITS · grade_6_0_valueguide | 1975-08-01 |
| 8.0 | $75.00 | PANEL_PROFITS · grade_8_0_valueguide | 1975-08-01 |
| 9.2 | $98.00 | PANEL_PROFITS · grade_9_2_valueguide | 1975-08-01 |
| 9.4 | $164.99 | PANEL_PROFITS · grade_9_4_valueguide | 1975-08-01 |
| 9.6 | $337.00 | PANEL_PROFITS · grade_9_6_valueguide | 1975-08-01 |
| 9.8 | $306.51 | PANEL_PROFITS · grade_9_8_valueguide | 1975-08-01 |
| RAW | $7.50 | PANEL_PROFITS · ungraded_valueguide | 1975-08-01 |
| 10.0 | $398.00 | PANEL_PROFITS · grade_10_0_valueguide | 1975-08-01 |
| 9.8 | $25.00 | 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 9 guide observations and 1 catalog references. These are reference values, not guaranteed sale proceeds.
Graded population
CGC records 81 graded copies for Detective Comics #450 (1975). Population is the number recorded by this grading source, not the total print run or all surviving copies.
Batman: "The Cape and Cowl Deathtrap"
Batman) terrorizes Harcourt, a criminal mastermind who admits to bribing a judge (Arnell) and the grand jury but he swears he doesn't know the identity of the person who killed Senator Locksley. Batman believes he knows the assassin, though not the one who hired him.
Later, assassin Jeremy Wormwood is invited to Bruce Wayne's office where he finds Harcourt who hires him to steal Batman's cape and cowl. Commissioner Gordon) calls Batman having received a bizarre phone message - a poem referencing famous historical and/or literary people. Batman deduces the poem refers to a wax museum and enters only to have all entrances sealed and locked. A 10,000 watt light comes on threatening to cook Batman alive unless he removes and leaves his cape and cowl after which, he may leave. Batman complies and Wormwood takes them back to Wayne's office.
Wormwood asks why Harcourt wanted them and Harcourt offers a deal - he'll tell his reasons if Wormwood tells him who hired him to kill the Senator. Wormwood reveals who hired him (Mike Carley - the party boss), then asks Harcourt what he's going to do with the cape and cowl. Harcourt replies "I'm going to wear them." Wormwood turns to find Batman attacking. After a short struggle, Batman defeats Wormwood and ushers in the awaiting police. Batman had been impersonating Harcourt all along.
Creative credits
Writers: Elliot S. Maggin, Bob Rozakis
Interior art: Walt Simonson, Al Milgrom
Source records & attribution
Panel Profits keeps each source identity attached to its edition record.
COMICBASE: comicbase:343344
GCD: 28929
PANEL PROFITS: 2317318