X-Men #111 VF+ (8.5)
1st appearance of Arcade! X-Men cover and story by Chris Claremont and John Byrne
X-Men #112 (Newsstand edition) CGC 9.4
Magneto vs the X-Men, Chris Claremont and John Byrne, Wolverine cover, White Pages
X-Men #112 CGC 9.6
Magneto vs the X-Men cover and story by Chris Claremont and John Byrne, Wolverine cover, White Pages
X-Men #112 (Newsstand edition) CGC 9.4
Magneto vs the X-Men, Chris Claremont and John Byrne, Wolverine cover, White Pages, 009
X-Men #113 (Mark Jewelers) CGC 8.5
Mark Jewelers Insert! X-Men vs. Magneto cover and story by John Byrne and Chris Claremont
X-Men #114 VF/NM (9.0)
X-Men cover and story by Chris Claremont and John Byrne
X-Men #114 CGC 9.6
1st Uncanny in logo, X-Men cover and story by Chris Claremont and John Byrne
X-Men #115 VF/NM (9.0)
X-Men vs Sauron cover art and story by John Byrne & Chris Claremont!
X-Men #115 (Mark Jewelers) CGC 9.0
Mark Jewelers Insert! X-Men vs Sauron cover art and story by John Byrne & Chris Claremont!
X-Men #115 VF/NM (9.0)
X-Men vs. Sauron by Chris Claremont and featuring John Byrne art!
X-Men #115 NM+ (9.6)
X-Men vs. Sauron by Chris Claremont and featuring John Byrne art! Super nice copy
X-Men #116 (Mark Jewelers) CGC 7.5
Mark Jewelers Insert! X-Men vs. the Sun God battle in the Savage Land cover and story by Chris Claremont and John Byrne, Ka-zar appears
X-Men #117 NM (9.4)
X-Men cover and story by Chris Claremont and John Byrne
X-Men #117 (Mark Jewelers) CGC 9.0
Mark Jewelers Insert! X-Men cover and story by Chris Claremont and John Byrne
X-Men #117 CGC 9.6
1st appearance of the Shadow King, X-Men cover and story by Chris Claremont and John Byrne
X-Men #118 NM (9.4)
1st appearance of Mariko Yashida, X-Men vs. Sun-fire cover and story by Chris Claremont and John Byrne
X-Men #118 NM- (9.2)
1st appearance of Mariko Yashida, X-Men & Sun Fire cover and story by Chris Claremont and John Byrne
X-Men #120 VF/NM (9.0)
1st appearance of Alpha Flight, X-Men cover and story, Chris Claremont and John Byrne cover and story
X-Men #122 CGC 9.6
1st appearance of Mastermind as Jason Wyngarde, X-Men cover and story by Chris Claremont and John Byrne, Luke Cage, Misty Knight, Colleen Wing and Mariko appear
X-Men #122 NM+ (9.6)
X_men cover and story, 1st appearance of Mastermind, Chris Claremont and John Byrne
X-Men #123 NM- (9.2)
X-Men vs. Arcade cover and story by Chris Claremont and John Byrne
X-Men #123 NM+ (9.6)
X-Men vs. Arcade cover and story, Spider-man appears. Chris Claremont story with John Byrne art!
X-Men #123 NM- (9.2)
X-Men vs. Arcade cover and story by Chris Claremont and John Byrne
X-Men #124 VF/NM (9.0)
X-Men cover and story, Chris Claremont story and John Byrne art! likely improvable