Low $425
 | 
Mid $1.3k
 | 
High $3.2k
  • 1st appearance of the new X-Men
  • 1st appearance of Storm
  • 1st appearance of Nightcrawler
  • 1st appearance of Colossus
  • 1st appearance of Thunderbird
  • 3rd appearance of Wolverine (some resources label this the 2nd full appearance)
  • 1st appearance of Illyana Rasputin as a child, later becomes Magik
  • 1st appearance of Krakoa, the Living Island
  • First use of the 'snikt' sound effect
Details
Publisher Marvel
Published May 1975
Written By Unknown
Illustrated By Unknown