X-Men #135 NM- (9.2)
Dark Phoenix vs. X-Men cover and story by Chris Claremont and John Byrne
X-Men #135 CGC 9.8
1st appearance of Senator Robert Kelly, White Pages, Dark Phoenix vs. the X-Men cover and story by Chris Claremont and John Byrne
X-Men #135 (Newsstand) NM- (9.2)
Dark Phoenix vs. X-Men cover and story by Chris Claremont and John Byrne
X-Men #135 CGC 9.8
1st appearance of Senator Robert Kelly, White Pages, Dark Phoenix vs. the X-Men cover and story by Chris Claremont and John Byrne, 6011
X-Men #136 VF/NM (9.0)
Classic Death of Dark Phoenix cover by John Byrne, X-Men cover and story
X-Men #137 NM- (9.2)
Death of Phoenix, X-Men cover and story by Chris Claremont and John Byrne
X-Men #137 (Newsstand edition) VF/NM (9.0)
X-Men Death of Phoenix cover and story by Chris Claremont and John Byrne
X-Men #137 CGC 9.8
Highest CertifiedDeath of Phoenix (Jean Grey), X-Men cover and story by Chris Claremont and John Byrne
X-Men #138 VF (8.0)
Cyclops quits! X-Men cover and story by Chris Claremont and John Byrne, History of the X-Men retold
X-Men #138 VF/NM (9.0)
Cyclops quits! X-Men cover and story by Chris Claremont and John Byrne, History of the X-Men retold
X-Men #138 VF+ (8.5)
Cyclops quits! X-Men cover and story by Chris Claremont and John Byrne, History of the X-Men retold, likely improvable
X-Men #138 CGC 9.6
X-Men cover and story, Cyclops quits, Funeral for Jean Grey, story by Chris Claremont and art by John Byrne!
X-Men #138 VF/NM (9.0)
Cyclops quits! X-Men cover and story by Chris Claremont and John Byrne, History of the X-Men retold
X-Men #138 CGC 9.8
Highest CertifiedCyclops quits, Funeral for Jean Grey, X-Men cover and story by Chris Claremont and John Byrne!
X-Men #138 CGC 9.2
X-Men cover and story, Cyclops quits, Funeral for Jean Grey, story by Chris Claremont and art by John Byrne!
X-Men #139 VF/NM (9.0)
Chris Claremont and John Byrne, Kitty Pryde joins, Alpha Flight appears, Wolverine gets new costume
X-Men #139 VF/NM (9.0)
Kitty Pryde joins, Wolverine gets new costume, John Byrne art and Chris Claremont
X-Men #140 VF/NM (9.0)
X-Men vs the Wendigo cover and story by Chris Claremont and John Byrne, Alpha Flight appears
X-Men #140 CGC 9.6
X-Men and Wolverine vs. Alpha Flight and the Wendigo cover and story by Chris Claremont and John Byrne
X-Men #140 CGC 9.6
X-Men and Wolverine vs. Alpha Flight and the Wendigo cover and story by Chris Claremont and John Byrne, 010
X-Men #141 CGC 9.8
X-Men Days of Future Past storyline cover and story by Chris Claremont with John Byrne art
X-Men #141 CGC 9.8
X-Men Days of Future Past storyline cover and story by Chris Claremont with John Byrne art. copy b
X-Men #142 CGC 9.6
White Pages, Days of Future Past, Wolverine dies, X-Men vs. the Sentinels cover and story by Chris Claremont and John Byrne