Marvel's The Defenders - long running series featuring The Hulk, Doctor Strange, Valkyrie, Sub-Mariner and others over the years!  This compiled set of 9 comics includes: 6 (1973, G, first Cyrus Black), 13 (1974, G, 1st Nebulon), 21 (1974, VG/F, first The Headsmen), 31 (1975, VG/F), 34 (1976, G/VG), 39 (1976, newsstand, VG/F), 81 (1979, F/VF), 82 (1980, VG/F), 83 (1980, VF/NM) - all grades are unprofessional estimates.  See photos for details.