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Hardy Boys, The (1970 - 1971)
Gold Key, 4 issues

Issue GD VG FN VF NM NM/MT
1
$44.30 $49.80 $65.50 $94.00 $266.00 $722.00
2
$16.00 $17.50 $22.40 $31.00 $78.40 $213.00
3
$17.10 $18.10 $21.40 $27.20 $61.10 $155.00
4
$10.00 $11.10 $13.50 $18.10 $31.90 $114.00