X-Men #129 CGC 9.2
1st appearance of Emma Frost, Sebastian Shaw and Kitty Pryde. X-Men cover and story by John Byrne and Chris Claremont.
X-Men #129 VF (8.0)
1st Kitty Pryde and Emma Frost, X-Men cover and story, Chris Claremont and John Byrne, copy b
X-Men #129 (Newsstand) CGC 9.8
1st appearance of Emma Frost, Sebastian Shaw and Kitty Pryde. X-Men cover and story by John Byrne and Chris Claremont.
X-Men #130 VF+ (8.5)
1st appearance of Dazzler, X-Men & Dazzler cover and story by Chris Claremont and John Byrne art!
X-Men #131 VF/NM (9.0)
1st Emma Frost cover, X-Men vs. the White Queen cover and story by Chris Claremont and John Byrne
X-Men #131 NM (9.4)
1st Emma Frost cover, X-Men vs the Hellfire club, Chris Claremont and John Byrne
X-Men #132 NM- (9.2)
X-Men vs. the Hellfire Club cover and story by Chris Claremont and John Byrne
X-Men #133 VF+ (8.5)
Chris Claremont and John Byrne, Wolverine solo story! X-Men story
X-Men #134 VF/NM (9.0)
1st Dark Phoenix, X-Men cover and story, Chris Claremont and John Byrne
X-Men #134 NM- (9.2)
X-Men vs Dark Phoenix and the Hellfire club cover and story by Chris Claremont and John Byrne, 1st Dark Phoenix!
X-Men #135 NM- (9.2)
Dark Phoenix vs. X-Men cover and story by Chris Claremont and John Byrne
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) CGC 9.8
Highest CertifiedDeath of Phoenix (Jean Grey), 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 #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 #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 #139 CGC 9.6
Kitty Pryde joins, Wolverine gets new costume, X-Men cover and story by 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 VF (8.0)
X-Men vs the Wendigo cover and story by Chris Claremont and John Byrne, Alpha Flight appears