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

Issue GD VG FN VF NM NM/MT
1
$39.20 $41.80 $51.00 $67.90 $146.00 $401.00
2
$15.90 $16.80 $20.70 $27.40 $53.30 $150.00
3
$18.00 $18.90 $22.40 $28.70 $61.60 $167.00
4
$16.00 $17.80 $21.50 $28.40 $42.93 $125.00