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

Issue GD VG FN VF NM NM/MT
1
$48.20 $55.70 $73.10 $107.00 $305.00 $993.00
2
$16.80 $18.80 $24.00 $33.80 $87.20 $279.00
3
$17.00 $18.00 $20.90 $26.40 $57.80 $155.00
4
$8.65 $9.65 $11.90 $16.00 $29.50 $114.00