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Cover: Bob Brown
Challengers of the Unknown #21
☆ Be the first to review + Add to your collection — Join freeContains 3 stories
The Weird World That Didn't Exist
The Challengers' Space-Pet Ally
Cosmo
Untitled Humor story
ComicBooks.com Value
Our Model is In Beta
Raw (VG) $26
CGC 9.2 · 3 in census $508
CGC 9.0 · 1 in census $300*
CGC 8.5 · 1 in census $206*
CGC 8.0 · 1 in census $158*
CGC 7.5 · 5 in census $126
CGC 7.0 · 4 in census $105*
Show all 16 grades ▾
CGC 6.5 · 2 in census $88*
CGC 6.0 · 1 in census $79*
CGC 5.5 · 2 in census $50
CGC 5.0 · 3 in census $50*
CGC 4.5 none in existence
CGC 4.0 none in existence
CGC 3.5 · 1 in census $40*
CGC 3.0 · 1 in census $31*
CGC 2.5 none in existence
CGC 2.0 · 1 in census $21*
* estimate — limited direct-sales data at this grade
Our model’s value — refined as new sales data arrives · CGC census counts shown where available
This exact issue on ebay
Raw — FN/VF ▾ $60–$92.61 4 listings
Raw — FINE ▾ $24.95–$48 2 listings
Raw — VG+ ▾ $17.66–$50.75 4 listings
Raw / ungraded ▾ $19.99–$53.69 11 listings
Verified matches for Challengers of the Unknown #21 · eBay asking prices, seen 32 days ago
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Reprints
Reprinted in Showcase Presents Challengers of the Unknown #2 (2008), Titanes Planetarios #140
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