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

Issue GD VG FN VF NM NM/MT
1
$42.80 $47.30 $62.00 $88.20 $242.00 $612.00
2
$15.70 $17.00 $21.70 $29.90 $72.90 $187.00
3
$17.20 $18.10 $21.60 $27.60 $62.10 $155.00
4
$10.80 $12.00 $14.60 $19.50 $33.50 $114.00