X-Men #51 VF+ (8.5)
X-men cover and story by Stan Lee, cover and art by Jim Steranko!
X-Men #52 VF (8.0)
X-Men cover and story, Magneto, Polaris, and Mesmero appear
X-Men #52 VF- (7.5)
X-Men cover and story, Magneto, Polaris, and Mesmero appear
X-Men #52 CGC 9.0
X-Men cover and story, Magneto, Polaris, and Mesmero appear
X-Men #52 VF/NM (9.0)
X-Men cover and story, Magneto, Polaris, and Mesmero appear
X-Men #53 NM- (9.2)
X-men vs. Blastaar cover and story, Stan Lee, cover and art by Barry Windsor Smith, his first comic book work
X-Men #53 VF- (7.5)
X-men vs. Blastaar cover and story, Stan Lee story and cover and art by Barry Windsor Smith, his first comic book work, light foxing
X-Men #56 CGC 9.4
1st appearance of the Living Monolith! Classic Neal Adams cover and art! X-Men vs. the Living Monolith cover and story
X-Men #60 F/VF (7.0)
Neal Adams cover and art, 1st appearance of Sauron! X-Men cover and story
X-Men #61 CGC 9.2
X-Men vs. Sauron cover and story, Neal Adams cover and art! 2nd appearance of Sauron
X-Men #61 F+ (6.5)
X-Men vs. Sauron cover and story, Neal Adams cover and art!
X-Men #61 VF/NM (9.0)
X-Men vs. Sauron cover and story, Neal Adams cover and art!
X-Men #62 F/VF (7.0)
X-Men vs. Ka-Zar in the Savage Land cover and story, Neal Adams cover and art!
X-Men #62 VF+ (8.5)
X-Men vs. Ka-Zar in the Savage Land cover and story, Neal Adams cover and art!
X-Men #63 F/VF (7.0)
X-Men vs Magneto cover and story! Neal Adams cover and art
X-Men #64 VF/NM (9.0)
1st appearance of Sunfire, X-Men cover and story, Neal Adams cover
X-Men #64 F/VF (7.0)
1st appearance of Sunfire, X-Men cover and story, Neal Adams cover art
X-Men #65 VF+ (8.5)
X-Men cover and story, Neal Adams cover and art, Professor X returns for the first time since issue #42.
X-Men #65 VF (8.0)
X-Men cover and story, Neal Adams cover and art, Professor X returns for the first time since issue #42.
X-Men #65 CGC 9.0
X-Men cover and story, Neal Adams cover and art, Professor X returns for the first time since issue #42.
X-Men #68 VF+ (8.5)
X-Men vs the Sentinels cover and story, might make 9.0